111981044 has 12 divisors (see below), whose sum is σ = 223962144. Its totient is φ = 47991864.

The previous prime is 111981019. The next prime is 111981059. The reversal of 111981044 is 440189111.

111981044 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 111980998 and 111981016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1999634 + ... + 1999689.

It is an arithmetic number, because the mean of its divisors is an integer number (18663512).

Almost surely, 2^111981044 is an apocalyptic number.

111981044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

111981044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111981044 is a wasteful number, since it uses less digits than its factorization.

111981044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999334 (or 3999332 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 111981044 is about 10582.1096195418. The cubic root of 111981044 is about 482.0012568621.

The spelling of 111981044 in words is "one hundred eleven million, nine hundred eighty-one thousand, forty-four".