111201131 has 6 divisors (see below), whose sum is σ = 118127460. Its totient is φ = 104659616.

The previous prime is 111201089. The next prime is 111201133. The reversal of 111201131 is 131102111.

It is a happy number.

It is not a de Polignac number, because 111201131 - 2¹⁴ = 111184747 is a prime.

It is a super-2 number, since 2×111201131² = 24731383071358322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111201133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192101 + ... + 192678.

It is an arithmetic number, because the mean of its divisors is an integer number (19687910).

Almost surely, 2^111201131 is an apocalyptic number.

111201131 is a deficient number, since it is larger than the sum of its proper divisors (6926329).

111201131 is an equidigital number, since it uses as much as digits as its factorization.

111201131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384813 (or 384796 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 111201131 is about 10545.1946876291. The cubic root of 111201131 is about 480.8796528688.

Adding to 111201131 its reverse (131102111), we get a palindrome (242303242).

The spelling of 111201131 in words is "one hundred eleven million, two hundred one thousand, one hundred thirty-one".