12123310131 has 12 divisors (see below), whose sum is σ = 17938557000. Its totient is φ = 7885079520.

The previous prime is 12123310127. The next prime is 12123310139. The reversal of 12123310131 is 13101332121.

It is not a de Polignac number, because 12123310131 - 2² = 12123310127 is a prime.

It is a super-2 number, since 2×12123310131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12123310139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16426881 + ... + 16427618.

It is an arithmetic number, because the mean of its divisors is an integer number (1494879750).

Almost surely, 2^12123310131 is an apocalyptic number.

12123310131 is a deficient number, since it is larger than the sum of its proper divisors (5815246869).

12123310131 is a wasteful number, since it uses less digits than its factorization.

12123310131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32854546 (or 32854543 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 12123310131 its reverse (13101332121), we get a palindrome (25224642252).

The spelling of 12123310131 in words is "twelve billion, one hundred twenty-three million, three hundred ten thousand, one hundred thirty-one".