Compare 21187 vs 21221
| Property | 21187 | 21221 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 211871 | 212211 |
| Prime factorization | 21187 | 21221 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21187 | 1, 21221 |
| Number of properties | 7 | 6 |
| Additive primes | 1107th | |
| Chen primes | 1172nd | |
| Cousin primes (1st member) | 361st | |
| Harmonic primes | 874th | |
| Isolated primes | 1663rd | 1665th |
| Primes | 2382nd | 2386th |
| Prime triplets (1st member) | 178th | |
| Pythagorean primes | 1184th | |
| Sexy primes (1st member) | 722nd | 723rd |
| Sophie germain primes | 346th | |
| Roman numberals | ||
| Base 2 | 1010010110000112 | 1010010111001012 |
| Base 3 | 10020012013 | 10020022223 |
| Base 4 | 110230034 | 110232114 |
| Base 5 | 11342225 | 11343415 |
| Base 6 | 2420316 | 2421256 |
| Base 7 | 1155257 | 1156047 |
| Base 8 | 513038 | 513458 |
| Base 9 | 320519 | 320889 |
| Base 10 | 2118710 | 2122110 |
| Base 11 | 14a1111 | 14a4211 |
| Base 12 | 1031712 | 1034512 |
| Base 13 | 984a13 | 987513 |
| Base 14 | 7a1514 | 7a3b14 |
| Base 15 | 642715 | 644b15 |
| Base 16 | 52c316 | 52e516 |