111320031220 has 12 divisors (see below), whose sum is σ = 233772065604. Its totient is φ = 44528012480.

The previous prime is 111320031217. The next prime is 111320031239. The reversal of 111320031220 is 22130023111.

It can be written as a sum of positive squares in 2 ways, for example, as 53052830224 + 58267200996 = 230332^2 + 241386^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111320031194 and 111320031203.

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 3 ways as a sum of consecutive naturals, for example, 2783000761 + ... + 2783000800.

It is an arithmetic number, because the mean of its divisors is an integer number (19481005467).

Almost surely, 2^111320031220 is an apocalyptic number.

111320031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111320031220 is an abundant number, since it is smaller than the sum of its proper divisors (122452034384).

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

111320031220 is a wasteful number, since it uses less digits than its factorization.

111320031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566001570 (or 5566001568 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 111320031220 its reverse (22130023111), we get a palindrome (133450054331).

The spelling of 111320031220 in words is "one hundred eleven billion, three hundred twenty million, thirty-one thousand, two hundred twenty".