3021
RFC 3021 permits 31-bit prefixes on point-to-point links.
- Odd
- Composite
Where 3021 fits
Why 3021 is special
A link between two routers needs two addresses, and the previous rules forced four, wasting half of every allocation of that kind.
Factors & digit properties
- Divisors (8)
- 1, 3, 19, 53, 57, 159, 1007, 3021
- Prime factorisation
- 3 × 19 × 53
- Digit sum
- 6
- Digital root
- 6
Representations
- Decimal
- 3021
- Scientific notation
- 3.021 × 10^3
Roman numerals
M M M X X I
Binary
1 0 1 1 1 1 0 0 1 1 0 1
1 × 2,048 + 0 × 1,024 + 1 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 1 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 3,021
Octal
5 7 1 5
5 × 512 + 7 × 64 + 1 × 8 + 5 × 1 = 3,021
Hexadecimal
b c d
b × 256 + c × 16 + d × 1 = 3,021
Read as powers of two: 2,048 + 512 + 256 + 128 + 64 + 8 + 4 + 1 = 3,021.
In historical numeral systems
Egyptian
3 lotuses, 2 hobbles, 1 stroke
3 × 1,000 + 2 × 10 + 1 × 1 = 3,021. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
5 corner wedges (sixties place), 2 corner wedges + 1 vertical wedge (units place)
50 × 60 + 21 = 3021. 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
Related numbers & connections
A 31-bit prefix is only expressible because CIDR removed fixed-size allocations.
View 4632 →Other connections
- is associated with4632
why?
Strength 0.50, confidence "high".
Technology & computing
RFC 3021 allows /31 prefixes on point-to-point links, using both addresses for hosts rather than reserving one for network and one for broadcast.
DocumentedTechnology & computingGeography: International — IETFPeriod: 2000
Common questions
Is 3021 a prime number?
No, 3021 is not prime.
What are the factors of 3021?
The factors of 3021 are 1, 3, 19, 53, 57, 159, 1007, 3021.
What is 3021 in Roman numerals?
3021 in Roman numerals is MMMXXI.
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