1101
IEEE 1101 standardises mechanical rack construction.
- Odd
- Composite
Where 1101 fits
Why 1101 is special
Eurocard and VME dimensions come from here, which is why a board from one manufacturer physically fits a crate from another.
Same number, different meanings
How 1101 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Eurocard and VME dimensions come from here, which is why a board from one manufacturer physically fits a crate from another.
- History
In 1101, a second wave of crusaders was destroyed in Anatolia, and the loss ended reinforcement of the new states (Anatolia).
- Technology & computing
IEEE 1101 specifies mechanical core specifications for microcomputer modules including Eurocard form factors and rack subrack dimensions.
1101 is part of
Factors & digit properties
- Divisors (4)
- 1, 3, 367, 1101
- Prime factorisation
- 3 × 367
- Digit sum
- 3
- Digital root
- 3
Representations
- Decimal
- 1101
- Scientific notation
- 1.101 × 10^3
Roman numerals
M C I
Binary
1 0 0 0 1 0 0 1 1 0 1
1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 1,101
Octal
2 1 1 5
2 × 512 + 1 × 64 + 1 × 8 + 5 × 1 = 1,101
Hexadecimal
4 4 d
4 × 256 + 4 × 16 + d × 1 = 1,101
Read as powers of two: 1,024 + 64 + 8 + 4 + 1 = 1,101.
In historical numeral systems
Egyptian
1 lotus, 1 coil of rope, 1 stroke
1 × 1,000 + 1 × 100 + 1 × 1 = 1,101. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 8 vertical wedges (sixties place), 2 corner wedges + 1 vertical wedge (units place)
18 × 60 + 21 = 1101. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
- Semiprime
- Harshad (Niven) number
- Lucky number (mathematical sieve)
Related numbers & connections
1101 is a year in the 12th century, in the 1100s.
The 19-inch rack and the Eurocard subrack standards together define what fits in a cabinet.
View 60297 →History
In 1101, a second wave of crusaders was destroyed in Anatolia, and the loss ended reinforcement of the new states (Anatolia).
DocumentedHistoryGeography: AnatoliaPeriod: 1101
Technology & computing
IEEE 1101 specifies mechanical core specifications for microcomputer modules including Eurocard form factors and rack subrack dimensions.
DocumentedTechnology & computingGeography: International — IEEEPeriod: 1987–
Common questions
Is 1101 a prime number?
No, 1101 is not prime.
What are the factors of 1101?
The factors of 1101 are 1, 3, 367, 1101.
What is 1101 in Roman numerals?
1101 in Roman numerals is MCI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026