111210221100 has 72 divisors (see below), whose sum is σ = 351019908288. Its totient is φ = 26960052800.

The previous prime is 111210221093. The next prime is 111210221113. The reversal of 111210221100 is 1122012111.

It is a super-2 number, since 2×111210221100² (a number of 23 digits) contains 22 as substring.

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

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, 16846734 + ... + 16853333.

It is an arithmetic number, because the mean of its divisors is an integer number (4875276504).

Almost surely, 2^111210221100 is an apocalyptic number.

111210221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111210221100 is an abundant number, since it is smaller than the sum of its proper divisors (239809687188).

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

111210221100 is a wasteful number, since it uses less digits than its factorization.

111210221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33700095 (or 33700088 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111210221100 its reverse (1122012111), we get a palindrome (112332233211).

The spelling of 111210221100 in words is "one hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, one hundred".