111609912 has 32 divisors (see below), whose sum is σ = 280648080. Its totient is φ = 36986880.

The previous prime is 111609859. The next prime is 111609917. The reversal of 111609912 is 219906111.

It is a self number, because there is not a number n which added to its sum of digits gives 111609912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111609917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9289 + ... + 17592.

Almost surely, 2^111609912 is an apocalyptic number.

111609912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111609912 is an abundant number, since it is smaller than the sum of its proper divisors (169038168).

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

111609912 is a wasteful number, since it uses less digits than its factorization.

111609912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27063 (or 27059 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 30.

The square root of 111609912 is about 10564.5592430541. The cubic root of 111609912 is about 481.4681783085.

It can be divided in two parts, 1116099 and 12, that added together give a palindrome (1116111).

The spelling of 111609912 in words is "one hundred eleven million, six hundred nine thousand, nine hundred twelve".