111001101920 has 48 divisors (see below), whose sum is σ = 265832461440. Its totient is φ = 43792210944.

The previous prime is 111001101863. The next prime is 111001101961. The reversal of 111001101920 is 29101100111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 4740080 + ... + 4763439.

It is an arithmetic number, because the mean of its divisors is an integer number (5538176280).

Almost surely, 2^111001101920 is an apocalyptic number.

111001101920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001101920 is an abundant number, since it is smaller than the sum of its proper divisors (154831359520).

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

111001101920 is an equidigital number, since it uses as much as digits as its factorization.

111001101920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503607 (or 9503599 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 17.

The spelling of 111001101920 in words is "one hundred eleven billion, one million, one hundred one thousand, nine hundred twenty".