111131980 has 24 divisors (see below), whose sum is σ = 233578800. Its totient is φ = 44414400.

The previous prime is 111131963. The next prime is 111131981. The reversal of 111131980 is 89131111.

It is not an unprimeable number, because it can be changed into a prime (111131981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37555 + ... + 40405.

It is an arithmetic number, because the mean of its divisors is an integer number (9732450).

Almost surely, 2^111131980 is an apocalyptic number.

111131980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111131980 is an abundant number, since it is smaller than the sum of its proper divisors (122446820).

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

111131980 is a wasteful number, since it uses less digits than its factorization.

111131980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4809 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 25.

The square root of 111131980 is about 10541.9153857352. The cubic root of 111131980 is about 480.7799530310.

The spelling of 111131980 in words is "one hundred eleven million, one hundred thirty-one thousand, nine hundred eighty".