111121119978 has 32 divisors (see below), whose sum is σ = 242477288640. Its totient is φ = 33668732160.

The previous prime is 111121119947. The next prime is 111121120001. The reversal of 111121119978 is 879911121111.

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, 428226 + ... + 636882.

It is an arithmetic number, because the mean of its divisors is an integer number (7577415270).

Almost surely, 2^111121119978 is an apocalyptic number.

111121119978 is an abundant number, since it is smaller than the sum of its proper divisors (131356168662).

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

111121119978 is a wasteful number, since it uses less digits than its factorization.

111121119978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216742.

The product of its digits is 9072, while the sum is 42.

The spelling of 111121119978 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred nineteen thousand, nine hundred seventy-eight".