113111312 has 40 divisors (see below), whose sum is σ = 228652032. Its totient is φ = 54144000.

The previous prime is 113111311. The next prime is 113111329. The reversal of 113111312 is 213111311.

It is a happy number.

It is a super-2 number, since 2×113111312² = 25588337804722688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (113111311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46937 + ... + 49287.

Almost surely, 2^113111312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113111312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114326016).

113111312 is an abundant number, since it is smaller than the sum of its proper divisors (115540720).

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

113111312 is a wasteful number, since it uses less digits than its factorization.

113111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487 (or 2481 counting only the distinct ones).

The product of its digits is 18, while the sum is 14.

The square root of 113111312 is about 10635.3802000681. The cubic root of 113111312 is about 483.6175062413.

Adding to 113111312 its reverse (213111311), we get a palindrome (326222623).

Subtracting 113111312 from its reverse (213111311), we obtain a palindrome (99999999).

The spelling of 113111312 in words is "one hundred thirteen million, one hundred eleven thousand, three hundred twelve".