111198131 has 8 divisors (see below), whose sum is σ = 121438128. Its totient is φ = 100980000.

The previous prime is 111198121. The next prime is 111198161. The reversal of 111198131 is 131891111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111198131 - 2²⁶ = 44089267 is a prime.

It is a super-2 number, since 2×111198131² = 24730048675786322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111198131.

It is not an unprimeable number, because it can be changed into a prime (111198121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6281 + ... + 16181.

It is an arithmetic number, because the mean of its divisors is an integer number (15179766).

Almost surely, 2^111198131 is an apocalyptic number.

111198131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111198131 is a deficient number, since it is larger than the sum of its proper divisors (10239997).

111198131 is a wasteful number, since it uses less digits than its factorization.

111198131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10933.

The product of its digits is 216, while the sum is 26.

The square root of 111198131 is about 10545.0524417852. The cubic root of 111198131 is about 480.8753284166.

The spelling of 111198131 in words is "one hundred eleven million, one hundred ninety-eight thousand, one hundred thirty-one".