111005027980 has 96 divisors (see below), whose sum is σ = 292009600512. Its totient is φ = 34434892800.

The previous prime is 111005027953. The next prime is 111005027981. The reversal of 111005027980 is 89720500111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (111005027981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154132 + ... + 495748.

It is an arithmetic number, because the mean of its divisors is an integer number (3041766672).

Almost surely, 2^111005027980 is an apocalyptic number.

111005027980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111005027980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146004800256).

111005027980 is an abundant number, since it is smaller than the sum of its proper divisors (181004572532).

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

111005027980 is a wasteful number, since it uses less digits than its factorization.

111005027980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341855 (or 341853 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 34.

The spelling of 111005027980 in words is "one hundred eleven billion, five million, twenty-seven thousand, nine hundred eighty".