12331131320 has 32 divisors (see below), whose sum is σ = 27860191920. Its totient is φ = 4911982080.

The previous prime is 12331131317. The next prime is 12331131331. The reversal of 12331131320 is 2313113321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12331131292 and 12331131301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629942 + ... + 649221.

Almost surely, 2^12331131320 is an apocalyptic number.

12331131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12331131320 is an abundant number, since it is smaller than the sum of its proper divisors (15529060600).

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

12331131320 is a wasteful number, since it uses less digits than its factorization.

12331131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279415 (or 1279411 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 12331131320 its reverse (2313113321), we get a palindrome (14644244641).

The spelling of 12331131320 in words is "twelve billion, three hundred thirty-one million, one hundred thirty-one thousand, three hundred twenty".