111201221200 has 60 divisors (see below), whose sum is σ = 270820743868. Its totient is φ = 43871155200.

The previous prime is 111201221191. The next prime is 111201221231. The reversal of 111201221200 is 2122102111.

It can be written as a sum of positive squares in 6 ways, for example, as 106998336 + 111094222864 = 10344^2 + 333308^2 .

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 11 ways as a sum of consecutive naturals, for example, 1874931 + ... + 1933330.

Almost surely, 2^111201221200 is an apocalyptic number.

111201221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201221200 is an abundant number, since it is smaller than the sum of its proper divisors (159619522668).

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

111201221200 is a wasteful number, since it uses less digits than its factorization.

111201221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808352 (or 3808341 counting only the distinct ones).

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

Adding to 111201221200 its reverse (2122102111), we get a palindrome (113323323311).

The spelling of 111201221200 in words is "one hundred eleven billion, two hundred one million, two hundred twenty-one thousand, two hundred".