111912021168 has 20 divisors (see below), whose sum is σ = 289106054808. Its totient is φ = 37304007040.

The previous prime is 111912021167. The next prime is 111912021211. The reversal of 111912021168 is 861120219111.

It is not an unprimeable number, because it can be changed into a prime (111912021167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165750173 + ... + 1165750268.

Almost surely, 2^111912021168 is an apocalyptic number.

It is an amenable number.

111912021168 is an abundant number, since it is smaller than the sum of its proper divisors (177194033640).

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

111912021168 is a wasteful number, since it uses less digits than its factorization.

111912021168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331500452 (or 2331500446 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 33.

The spelling of 111912021168 in words is "one hundred eleven billion, nine hundred twelve million, twenty-one thousand, one hundred sixty-eight".