Compare 1021 vs 1291
| Property | 1021 | 1291 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 10211 | 12911 |
| Prime factorization | 1021 | 1291 |
| Divisors count | 2 | 2 |
| Divisors | 1, 1021 | 1, 1291 |
| Number of properties | 8 | 9 |
| Additive primes | 113th | |
| Chen primes | 137th | |
| Emirps | 38th | |
| Harmonic primes | 61st | 73rd |
| Long primes | 62nd | 80th |
| Lucky primes | 45th | 54th |
| Primes | 172nd | 210th |
| Pythagorean primes | 83rd | |
| Sexy primes (1st member) | 91st | |
| Sexy prime triplets (1st member) | 35th | |
| Solinas primes | 46th | |
| Twin primes (2nd member) | 36th | 44th |
| Roman numberals | MXXI | MCCXCI |
| Base 2 | 11111111012 | 101000010112 |
| Base 3 | 11012113 | 12022113 |
| Base 4 | 333314 | 1100234 |
| Base 5 | 130415 | 201315 |
| Base 6 | 44216 | 55516 |
| Base 7 | 26567 | 35237 |
| Base 8 | 17758 | 24138 |
| Base 9 | 13549 | 16849 |
| Base 10 | 102110 | 129110 |
| Base 11 | 84911 | a7411 |
| Base 12 | 71112 | 8b712 |
| Base 13 | 60713 | 78413 |
| Base 14 | 52d14 | 68314 |
| Base 15 | 48115 | 5b115 |
| Base 16 | 3fd16 | 50b16 |