111110121992 has 32 divisors (see below), whose sum is σ = 209000977920. Its totient is φ = 55376678400.

The previous prime is 111110121989. The next prime is 111110122007. The reversal of 111110121992 is 299121011111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6894488 + ... + 6910584.

It is an arithmetic number, because the mean of its divisors is an integer number (6531280560).

Almost surely, 2^111110121992 is an apocalyptic number.

It is an amenable number.

111110121992 is a deficient number, since it is larger than the sum of its proper divisors (97890855928).

111110121992 is a wasteful number, since it uses less digits than its factorization.

111110121992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18821 (or 18817 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 29.

The spelling of 111110121992 in words is "one hundred eleven billion, one hundred ten million, one hundred twenty-one thousand, nine hundred ninety-two".