1121
1121 is a year in the 12th century. Abelard's book on the Trinity was condemned and burned at Soissons (France).
- Odd
- Composite
Where 1121 fits
Why 1121 is special
1121 has a profile because of what happened in it rather than because of any property of the number: Abelard's book on the Trinity was condemned and burned at Soissons (France).
1121 is part of
Factors & digit properties
- Divisors (4)
- 1, 19, 59, 1121
- Prime factorisation
- 19 × 59
- Digit sum
- 5
- Digital root
- 5
Representations
- Decimal
- 1121
- Scientific notation
- 1.121 × 10^3
Roman numerals
M C X X I
Binary
1 0 0 0 1 1 0 0 0 0 1
1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 1 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,121
Octal
2 1 4 1
2 × 512 + 1 × 64 + 4 × 8 + 1 × 1 = 1,121
Hexadecimal
4 6 1
4 × 256 + 6 × 16 + 1 × 1 = 1,121
Read as powers of two: 1,024 + 64 + 32 + 1 = 1,121.
In historical numeral systems
Egyptian
1 lotus, 1 coil of rope, 2 hobbles, 1 stroke
1 × 1,000 + 1 × 100 + 2 × 10 + 1 × 1 = 1,121. 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), 4 corner wedges + 1 vertical wedge (units place)
18 × 60 + 41 = 1121. 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
- Happy number
- Semiprime
Related numbers & connections
1121 is a year in the 12th century, in the 1120s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1121, Abelard's book on the Trinity was condemned and burned at Soissons (France).
DocumentedHistoryGeography: FrancePeriod: 1121
Common questions
Is 1121 a prime number?
No, 1121 is not prime.
What are the factors of 1121?
The factors of 1121 are 1, 19, 59, 1121.
What is 1121 in Roman numerals?
1121 in Roman numerals is MCXXI.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026