12999131 has 2 divisors, whose sum is σ = 12999132. Its totient is φ = 12999130.

The previous prime is 12999127. The next prime is 12999143. The reversal of 12999131 is 13199921.

12999131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12999131 - 2² = 12999127 is a prime.

It is a super-2 number, since 2×12999131² = 337954813510322, which contains 22 as substring.

It is equal to p₈₄₉₁₉₄ and since 12999131 and 849194 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 12999091 and 12999100.

It is not a weakly prime, because it can be changed into another prime (12999191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6499565 + 6499566.

It is an arithmetic number, because the mean of its divisors is an integer number (6499566).

Almost surely, 2^12999131 is an apocalyptic number.

12999131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12999131 is an equidigital number, since it uses as much as digits as its factorization.

12999131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 35.

The square root of 12999131 is about 3605.4307648324. The cubic root of 12999131 is about 235.1282293993.

The spelling of 12999131 in words is "twelve million, nine hundred ninety-nine thousand, one hundred thirty-one".