12331311312 has 20 divisors (see below), whose sum is σ = 31855887680. Its totient is φ = 4110437088.

The previous prime is 12331311269. The next prime is 12331311313. The reversal of 12331311312 is 21311313321.

It is a happy number.

It is a super-2 number, since 2×12331311312² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331311313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128451112 + ... + 128451207.

It is an arithmetic number, because the mean of its divisors is an integer number (1592794384).

Almost surely, 2^12331311312 is an apocalyptic number.

12331311312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12331311312 is an abundant number, since it is smaller than the sum of its proper divisors (19524576368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12331311312 is a wasteful number, since it uses less digits than its factorization.

12331311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256902330 (or 256902324 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 12331311312 its reverse (21311313321), we get a palindrome (33642624633).

The spelling of 12331311312 in words is "twelve billion, three hundred thirty-one million, three hundred eleven thousand, three hundred twelve".