13231131221220 has 192 divisors, whose sum is σ = 42222669431040. Its totient is φ = 3066278656000.

The previous prime is 13231131221207. The next prime is 13231131221291. The reversal of 13231131221220 is 2212213113231.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1489047 + ... + 5355326.

It is an arithmetic number, because the mean of its divisors is an integer number (219909736620).

Almost surely, 2^{13231131221220} is an apocalyptic number.

13231131221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13231131221220 is an abundant number, since it is smaller than the sum of its proper divisors (28991538209820).

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

13231131221220 is a wasteful number, since it uses less digits than its factorization.

13231131221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844526 (or 6844524 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 13231131221220 its reverse (2212213113231), we get a palindrome (15443344334451).

The spelling of 13231131221220 in words is "thirteen trillion, two hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred twenty".