Compare 1021 vs 1231
| Property | 1021 | 1231 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 10211 | 12311 |
| Prime factorization | 1021 | 1231 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1021 | 1, 1231 |
| Number of properties | 8 | 6 |
| Additive primes | 108th | |
| Emirps | 38th | 56th |
| Harmonic primes | 61st | |
| Long primes | 62nd | |
| Lucky primes | 45th | 52nd |
| Primes | 172nd | 202nd |
| Pythagorean primes | 83rd | |
| Sexy primes (1st member) | 88th | |
| Solinas primes | 46th | |
| Twin primes (2nd member) | 36th | 42nd |
| Roman numberals | MXXI | MCCXXXI |
| Base 2 | 11111111012 | 100110011112 |
| Base 3 | 11012113 | 12001213 |
| Base 4 | 333314 | 1030334 |
| Base 5 | 130415 | 144115 |
| Base 6 | 44216 | 54116 |
| Base 7 | 26567 | 34067 |
| Base 8 | 17758 | 23178 |
| Base 9 | 13549 | 16179 |
| Base 10 | 102110 | 123110 |
| Base 11 | 84911 | a1a11 |
| Base 12 | 71112 | 86712 |
| Base 13 | 60713 | 73913 |
| Base 14 | 52d14 | 63d14 |
| Base 15 | 48115 | 57115 |
| Base 16 | 3fd16 | 4cf16 |