111312031031 has 16 divisors (see below), whose sum is σ = 117533919360. Its totient is φ = 105126996960.

The previous prime is 111312031009. The next prime is 111312031043. The reversal of 111312031031 is 130130213111.

It is a de Polignac number, because none of the positive numbers 2^k-111312031031 is a prime.

It is a super-2 number, since 2×111312031031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111312031001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8531645 + ... + 8544681.

It is an arithmetic number, because the mean of its divisors is an integer number (7345869960).

Almost surely, 2^111312031031 is an apocalyptic number.

111312031031 is a deficient number, since it is larger than the sum of its proper divisors (6221888329).

111312031031 is a wasteful number, since it uses less digits than its factorization.

111312031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14414.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 111312031031 its reverse (130130213111), we get a palindrome (241442244142).

The spelling of 111312031031 in words is "one hundred eleven billion, three hundred twelve million, thirty-one thousand, thirty-one".