111100112220120 has 64 divisors (see below), whose sum is σ = 334228749984000. Its totient is φ = 29544170963328.

The previous prime is 111100112220091. The next prime is 111100112220137. The reversal of 111100112220120 is 21022211001111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111100112220120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289419690 + ... + 1289505849.

It is an arithmetic number, because the mean of its divisors is an integer number (5222324218500).

Almost surely, 2^{111100112220120} is an apocalyptic number.

111100112220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111100112220120 is an abundant number, since it is smaller than the sum of its proper divisors (223128637763880).

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

111100112220120 is a wasteful number, since it uses less digits than its factorization.

111100112220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578925912 (or 2578925908 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111100112220120 its reverse (21022211001111), we get a palindrome (132122323221231).

The spelling of 111100112220120 in words is "one hundred eleven trillion, one hundred billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty".