113231211220 has 24 divisors (see below), whose sum is σ = 248124046464. Its totient is φ = 43323245856.

The previous prime is 113231211199. The next prime is 113231211251. The reversal of 113231211220 is 22112132311.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123076944 + ... + 123077863.

It is an arithmetic number, because the mean of its divisors is an integer number (10338501936).

Almost surely, 2^113231211220 is an apocalyptic number.

113231211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113231211220 is an abundant number, since it is smaller than the sum of its proper divisors (134892835244).

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

113231211220 is a wasteful number, since it uses less digits than its factorization.

113231211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246154839 (or 246154837 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 113231211220 its reverse (22112132311), we get a palindrome (135343343531).

The spelling of 113231211220 in words is "one hundred thirteen billion, two hundred thirty-one million, two hundred eleven thousand, two hundred twenty".