111120021992 has 64 divisors (see below), whose sum is σ = 248525003520. Its totient is φ = 45541698048.

The previous prime is 111120021973. The next prime is 111120022019. The reversal of 111120021992 is 299120021111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8000558 + ... + 8014434.

It is an arithmetic number, because the mean of its divisors is an integer number (3883203180).

Almost surely, 2^111120021992 is an apocalyptic number.

It is an amenable number.

111120021992 is an abundant number, since it is smaller than the sum of its proper divisors (137404981528).

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

111120021992 is a wasteful number, since it uses less digits than its factorization.

111120021992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20130 (or 20126 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 111120021992 in words is "one hundred eleven billion, one hundred twenty million, twenty-one thousand, nine hundred ninety-two".