12312402131 has 6 divisors (see below), whose sum is σ = 12620030796. Its totient is φ = 12012098000.

The previous prime is 12312402127. The next prime is 12312402149. The reversal of 12312402131 is 13120421321.

It is not a de Polignac number, because 12312402131 - 2² = 12312402127 is a prime.

It is a super-2 number, since 2×12312402131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312402161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3660545 + ... + 3663906.

It is an arithmetic number, because the mean of its divisors is an integer number (2103338466).

Almost surely, 2^12312402131 is an apocalyptic number.

12312402131 is a deficient number, since it is larger than the sum of its proper divisors (307628665).

12312402131 is an frugal number, since it uses more digits than its factorization.

12312402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7324533 (or 7324492 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12312402131 its reverse (13120421321), we get a palindrome (25432823452).

The spelling of 12312402131 in words is "twelve billion, three hundred twelve million, four hundred two thousand, one hundred thirty-one".