111216131 has 16 divisors (see below), whose sum is σ = 124756800. Its totient is φ = 98437248.

The previous prime is 111216113. The next prime is 111216137. The reversal of 111216131 is 131612111.

It is not a de Polignac number, because 111216131 - 2¹⁰ = 111215107 is a prime.

It is a super-2 number, since 2×111216131² = 24738055589218322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111216137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58250 + ... + 60128.

It is an arithmetic number, because the mean of its divisors is an integer number (7797300).

Almost surely, 2^111216131 is an apocalyptic number.

111216131 is a deficient number, since it is larger than the sum of its proper divisors (13540669).

111216131 is a wasteful number, since it uses less digits than its factorization.

111216131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078.

The product of its digits is 36, while the sum is 17.

The square root of 111216131 is about 10545.9058880686. The cubic root of 111216131 is about 480.9012739633.

Adding to 111216131 its reverse (131612111), we get a palindrome (242828242).

The spelling of 111216131 in words is "one hundred eleven million, two hundred sixteen thousand, one hundred thirty-one".