111100031220 has 96 divisors (see below), whose sum is σ = 324682831872. Its totient is φ = 28331791488.

The previous prime is 111100031213. The next prime is 111100031257. The reversal of 111100031220 is 22130001111.

111100031220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111100031196 and 111100031205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8498409 + ... + 8511471.

It is an arithmetic number, because the mean of its divisors is an integer number (3382112832).

Almost surely, 2^111100031220 is an apocalyptic number.

111100031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111100031220 is an abundant number, since it is smaller than the sum of its proper divisors (213582800652).

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

111100031220 is a wasteful number, since it uses less digits than its factorization.

111100031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19261 (or 19259 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 111100031220 its reverse (22130001111), we get a palindrome (133230032331).

The spelling of 111100031220 in words is "one hundred eleven billion, one hundred million, thirty-one thousand, two hundred twenty".