12912320931 has 8 divisors (see below), whose sum is σ = 17218731600. Its totient is φ = 8607062112.

The previous prime is 12912320887. The next prime is 12912320933. The reversal of 12912320931 is 13902321921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12912320931 - 2²⁹ = 12375450019 is a prime.

It is a super-4 number, since 4×12912320931⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12912320892 and 12912320901.

It is not an unprimeable number, because it can be changed into a prime (12912320933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261456 + ... + 306893.

It is an arithmetic number, because the mean of its divisors is an integer number (2152341450).

Almost surely, 2^12912320931 is an apocalyptic number.

12912320931 is a deficient number, since it is larger than the sum of its proper divisors (4306410669).

12912320931 is an equidigital number, since it uses as much as digits as its factorization.

12912320931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575925.

The product of its (nonzero) digits is 5832, while the sum is 33.

The spelling of 12912320931 in words is "twelve billion, nine hundred twelve million, three hundred twenty thousand, nine hundred thirty-one".