113931111 has 24 divisors (see below), whose sum is σ = 179830144. Its totient is φ = 62848800.

The previous prime is 113931109. The next prime is 113931133. The reversal of 113931111 is 111139311.

It is not a de Polignac number, because 113931111 - 2¹ = 113931109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113931101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14436 + ... + 20886.

Almost surely, 2^113931111 is an apocalyptic number.

113931111 is a deficient number, since it is larger than the sum of its proper divisors (65899033).

113931111 is an equidigital number, since it uses as much as digits as its factorization.

113931111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6519 (or 6490 counting only the distinct ones).

The product of its digits is 81, while the sum is 21.

The square root of 113931111 is about 10673.8517415224. The cubic root of 113931111 is about 484.7830694577.

The spelling of 113931111 in words is "one hundred thirteen million, nine hundred thirty-one thousand, one hundred eleven".