Compare 821 vs 1301
| Property | 821 | 1301 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 8211 | 13011 |
| Prime factorization | 821 | 1301 |
| Divisors count | 2 | 2 |
| Divisors | 1, 821 | 1, 1301 |
| Number of properties | 10 | 12 |
| Additive primes | 75th | 115th |
| Centered square primes | 13th | |
| Chen primes | 97th | 139th |
| Cousin primes (2nd member) | 47th | |
| Emirps | 62nd | |
| Good primes | 40th | |
| Long primes | 50th | 82nd |
| Primes | 142nd | 212th |
| Prime quadruplets (1st member) | 5th | |
| Prime triplets (1st member) | 25th | 35th |
| Prime triplets (2nd member) | 34th | |
| Pythagorean primes | 69th | 105th |
| Sexy primes (1st member) | 64th | 93rd |
| Twin primes (1st member) | 32nd | 45th |
| Roman numberals | DCCCXXI | MCCCI |
| Base 2 | 11001101012 | 101000101012 |
| Base 3 | 10101023 | 12100123 |
| Base 4 | 303114 | 1101114 |
| Base 5 | 112415 | 202015 |
| Base 6 | 34456 | 100056 |
| Base 7 | 22527 | 35367 |
| Base 8 | 14658 | 24258 |
| Base 9 | 11129 | 17059 |
| Base 10 | 82110 | 130110 |
| Base 11 | 68711 | a8311 |
| Base 12 | 58512 | 90512 |
| Base 13 | 4b213 | 79113 |
| Base 14 | 42914 | 68d14 |
| Base 15 | 39b15 | 5bb15 |
| Base 16 | 33516 | 51516 |