Compare 21021 vs 21023
| Property | 21021 | 21023 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 4 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 31 × 72 × 111 × 131 | 210231 |
| Prime factorization | 3 × 7 × 7 × 11 × 13 | 21023 |
| Divisors count | 24 | 2 |
| Divisors | 1, 3, 7, 11, 13, 21, 33, 39, 49, 77, 91, 143, 147, 231, 273, 429, 539, 637, 1001, 1617, 1911, 3003, 7007, 21021 | 1, 21023 |
| Number of properties | 0 | 9 |
| Cousin primes (2nd member) | 359th | |
| Harmonic primes | 869th | |
| Isolated primes | 1649th | |
| Long primes | 900th | |
| Primes | 2366th | |
| Prime quintuplet 2s (5th member) | 7th | |
| Prime triplets (3rd member) | 177th | |
| Sexy primes (2nd member) | 716th | |
| Sexy prime triplets (3rd member) | 196th | |
| Roman numberals | ||
| Base 2 | 1010010000111012 | 1010010000111112 |
| Base 3 | 10012111203 | 10012111223 |
| Base 4 | 110201314 | 110201334 |
| Base 5 | 11330415 | 11330435 |
| Base 6 | 2411536 | 2411556 |
| Base 7 | 1152007 | 1152027 |
| Base 8 | 510358 | 510378 |
| Base 9 | 317469 | 317489 |
| Base 10 | 2102110 | 2102310 |
| Base 11 | 1488011 | 1488211 |
| Base 12 | 101b912 | 101bb12 |
| Base 13 | 975013 | 975213 |
| Base 14 | 793714 | 793914 |
| Base 15 | 636615 | 636815 |
| Base 16 | 521d16 | 521f16 |