111012131220 has 48 divisors (see below), whose sum is σ = 311051119680. Its totient is φ = 29582553856.

The previous prime is 111012131179. The next prime is 111012131249. The reversal of 111012131220 is 22131210111.

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 111012131220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559590 + ... + 731549.

It is an arithmetic number, because the mean of its divisors is an integer number (6480231660).

Almost surely, 2^111012131220 is an apocalyptic number.

111012131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012131220 is an abundant number, since it is smaller than the sum of its proper divisors (200038988460).

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

111012131220 is a wasteful number, since it uses less digits than its factorization.

111012131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292584 (or 1292582 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 111012131220 its reverse (22131210111), we get a palindrome (133143341331).

The spelling of 111012131220 in words is "one hundred eleven billion, twelve million, one hundred thirty-one thousand, two hundred twenty".