111921568 has 24 divisors (see below), whose sum is σ = 240377760. Its totient is φ = 50873280.

The previous prime is 111921521. The next prime is 111921569. The reversal of 111921568 is 865129111.

It is not an unprimeable number, because it can be changed into a prime (111921569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158628 + ... + 159331.

It is an arithmetic number, because the mean of its divisors is an integer number (10015740).

Almost surely, 2^111921568 is an apocalyptic number.

It is an amenable number.

111921568 is an abundant number, since it is smaller than the sum of its proper divisors (128456192).

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

111921568 is a wasteful number, since it uses less digits than its factorization.

111921568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317980 (or 317972 counting only the distinct ones).

The product of its digits is 4320, while the sum is 34.

The square root of 111921568 is about 10579.2990315994. The cubic root of 111921568 is about 481.9159073465.

The spelling of 111921568 in words is "one hundred eleven million, nine hundred twenty-one thousand, five hundred sixty-eight".