113231131320 has 128 divisors (see below), whose sum is σ = 346277332800. Its totient is φ = 29610307584.

The previous prime is 113231131259. The next prime is 113231131327. The reversal of 113231131320 is 23131132311.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113231131327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18778066 + ... + 18784094.

Almost surely, 2^113231131320 is an apocalyptic number.

113231131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113231131320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173138666400).

113231131320 is an abundant number, since it is smaller than the sum of its proper divisors (233046201480).

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

113231131320 is a wasteful number, since it uses less digits than its factorization.

113231131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049 (or 9045 counting only the distinct ones).

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

Adding to 113231131320 its reverse (23131132311), we get a palindrome (136362263631).

Subtracting from 113231131320 its reverse (23131132311), we obtain a palindrome (90099999009).

The spelling of 113231131320 in words is "one hundred thirteen billion, two hundred thirty-one million, one hundred thirty-one thousand, three hundred twenty".