111442131 has 12 divisors (see below), whose sum is σ = 161112952. Its totient is φ = 74229696.

The previous prime is 111442109. The next prime is 111442147. The reversal of 111442131 is 131244111.

It is not a de Polignac number, because 111442131 - 2⁷ = 111442003 is a prime.

It is a super-2 number, since 2×111442131² = 24838697123642322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111442171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6900 + ... + 16446.

Almost surely, 2^111442131 is an apocalyptic number.

111442131 is a deficient number, since it is larger than the sum of its proper divisors (49670821).

111442131 is a wasteful number, since it uses less digits than its factorization.

111442131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850 (or 10847 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 111442131 is about 10556.6155087698. The cubic root of 111442131 is about 481.2267967449.

Adding to 111442131 its reverse (131244111), we get a palindrome (242686242).

The spelling of 111442131 in words is "one hundred eleven million, four hundred forty-two thousand, one hundred thirty-one".