111042631 has 16 divisors (see below), whose sum is σ = 135784960. Its totient is φ = 88685280.

The previous prime is 111042611. The next prime is 111042667. The reversal of 111042631 is 136240111.

It is a cyclic number.

It is not a de Polignac number, because 111042631 - 2⁵ = 111042599 is a prime.

It is a super-2 number, since 2×111042631² = 24660931798804322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111042599 and 111042608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111042601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270 + ... + 14956.

It is an arithmetic number, because the mean of its divisors is an integer number (8486560).

Almost surely, 2^111042631 is an apocalyptic number.

111042631 is a deficient number, since it is larger than the sum of its proper divisors (24742329).

111042631 is a wasteful number, since it uses less digits than its factorization.

111042631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13774.

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

The square root of 111042631 is about 10537.6767363589. The cubic root of 111042631 is about 480.6510710610.

Adding to 111042631 its reverse (136240111), we get a palindrome (247282742).

The spelling of 111042631 in words is "one hundred eleven million, forty-two thousand, six hundred thirty-one".