111220022100 has 72 divisors (see below), whose sum is σ = 351050843808. Its totient is φ = 26962428800.

The previous prime is 111220022083. The next prime is 111220022117. The reversal of 111220022100 is 1220022111.

It is an interprime number because it is at equal distance from previous prime (111220022083) and next prime (111220022117).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16848219 + ... + 16854818.

It is an arithmetic number, because the mean of its divisors is an integer number (4875706164).

Almost surely, 2^111220022100 is an apocalyptic number.

111220022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220022100 is an abundant number, since it is smaller than the sum of its proper divisors (239830821708).

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

111220022100 is a wasteful number, since it uses less digits than its factorization.

111220022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33703065 (or 33703058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111220022100 its reverse (1220022111), we get a palindrome (112440044211).

The spelling of 111220022100 in words is "one hundred eleven billion, two hundred twenty million, twenty-two thousand, one hundred".