111110201988 has 12 divisors (see below), whose sum is σ = 259257138000. Its totient is φ = 37036733992.

The previous prime is 111110201977. The next prime is 111110201999. The reversal of 111110201988 is 889102011111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111110201977) and next prime (111110201999).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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, 4629591738 + ... + 4629591761.

It is an arithmetic number, because the mean of its divisors is an integer number (21604761500).

Almost surely, 2^111110201988 is an apocalyptic number.

It is an amenable number.

111110201988 is an abundant number, since it is smaller than the sum of its proper divisors (148146936012).

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

111110201988 is a wasteful number, since it uses less digits than its factorization.

111110201988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9259183506 (or 9259183504 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 33.

The spelling of 111110201988 in words is "one hundred eleven billion, one hundred ten million, two hundred one thousand, nine hundred eighty-eight".