12312103131 has 12 divisors (see below), whose sum is σ = 18027768408. Its totient is φ = 8095629024.

The previous prime is 12312103079. The next prime is 12312103147. The reversal of 12312103131 is 13130121321.

It is not a de Polignac number, because 12312103131 - 2¹⁰ = 12312102107 is a prime.

It is a super-2 number, since 2×12312103131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12312103031) 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, 9369285 + ... + 9370598.

It is an arithmetic number, because the mean of its divisors is an integer number (1502314034).

Almost surely, 2^12312103131 is an apocalyptic number.

12312103131 is a deficient number, since it is larger than the sum of its proper divisors (5715665277).

12312103131 is a wasteful number, since it uses less digits than its factorization.

12312103131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18739962 (or 18739959 counting only the distinct ones).

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

Adding to 12312103131 its reverse (13130121321), we get a palindrome (25442224452).

The spelling of 12312103131 in words is "twelve billion, three hundred twelve million, one hundred three thousand, one hundred thirty-one".