111122221200 has 60 divisors (see below), whose sum is σ = 355961519088. Its totient is φ = 29632592000.

The previous prime is 111122221181. The next prime is 111122221253. The reversal of 111122221200 is 2122221111.

It is a tau number, because it is divible by the number of its divisors (60).

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 111122221200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46299726 + ... + 46302125.

Almost surely, 2^111122221200 is an apocalyptic number.

111122221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111122221200 is an abundant number, since it is smaller than the sum of its proper divisors (244839297888).

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

111122221200 is a wasteful number, since it uses less digits than its factorization.

111122221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92601872 (or 92601861 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111122221200 its reverse (2122221111), we get a palindrome (113244442311).

The spelling of 111122221200 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred".