Compare 1220 vs 1231
| Property | 1220 | 1231 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 22 × 51 × 611 | 12311 |
| Prime factorization | 2 × 2 × 5 × 61 | 1231 |
| Divisors count | 12 | 2 |
| Divisors | 1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220 | 1, 1231 |
| Number of properties | 0 | 6 |
| Additive primes | 108th | |
| Emirps | 56th | |
| Lucky primes | 52nd | |
| Primes | 202nd | |
| Sexy primes (1st member) | 88th | |
| Twin primes (2nd member) | 42nd | |
| Roman numberals | MCCXX | MCCXXXI |
| Base 2 | 100110001002 | 100110011112 |
| Base 3 | 12000123 | 12001213 |
| Base 4 | 1030104 | 1030334 |
| Base 5 | 143405 | 144115 |
| Base 6 | 53526 | 54116 |
| Base 7 | 33627 | 34067 |
| Base 8 | 23048 | 23178 |
| Base 9 | 16059 | 16179 |
| Base 10 | 122010 | 123110 |
| Base 11 | a0a11 | a1a11 |
| Base 12 | 85812 | 86712 |
| Base 13 | 72b13 | 73913 |
| Base 14 | 63214 | 63d14 |
| Base 15 | 56515 | 57115 |
| Base 16 | 4c416 | 4cf16 |