111001197138 has 64 divisors (see below), whose sum is σ = 249548947200. Its totient is φ = 32659469568.

The previous prime is 111001197137. The next prime is 111001197169. The reversal of 111001197138 is 831791100111.

It is a junction number, because it is equal to n+sod(n) for n = 111001197099 and 111001197108.

It is not an unprimeable number, because it can be changed into a prime (111001197133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7838088 + ... + 7852236.

It is an arithmetic number, because the mean of its divisors is an integer number (3899202300).

Almost surely, 2^111001197138 is an apocalyptic number.

111001197138 is an abundant number, since it is smaller than the sum of its proper divisors (138547750062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111001197138 is a wasteful number, since it uses less digits than its factorization.

111001197138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18563.

The product of its (nonzero) digits is 1512, while the sum is 33.

Adding to 111001197138 its reverse (831791100111), we get a palindrome (942792297249).

The spelling of 111001197138 in words is "one hundred eleven billion, one million, one hundred ninety-seven thousand, one hundred thirty-eight".