111120221200 has 60 divisors (see below), whose sum is σ = 282670250580. Its totient is φ = 41833492480.

The previous prime is 111120221171. The next prime is 111120221221. The reversal of 111120221200 is 2122021111.

It can be written as a sum of positive squares in 6 ways, for example, as 2821309456 + 108298911744 = 53116^2 + 329088^2 .

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, 8163805 + ... + 8177404.

It is an arithmetic number, because the mean of its divisors is an integer number (4711170843).

Almost surely, 2^111120221200 is an apocalyptic number.

111120221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111120221200 is an abundant number, since it is smaller than the sum of its proper divisors (171550029380).

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

111120221200 is a wasteful number, since it uses less digits than its factorization.

111120221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16341244 (or 16341233 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111120221200 its reverse (2122021111), we get a palindrome (113242242311).

The spelling of 111120221200 in words is "one hundred eleven billion, one hundred twenty million, two hundred twenty-one thousand, two hundred".