111122121200 has 60 divisors (see below), whose sum is σ = 268514247768. Its totient is φ = 44191891200.

The previous prime is 111122121169. The next prime is 111122121221. The reversal of 111122121200 is 2121221111.

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, 733706 + ... + 872105.

Almost surely, 2^111122121200 is an apocalyptic number.

111122121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111122121200 is an abundant number, since it is smaller than the sum of its proper divisors (157392126568).

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

111122121200 is a wasteful number, since it uses less digits than its factorization.

111122121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606002 (or 1605991 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111122121200 its reverse (2121221111), we get a palindrome (113243342311).

It can be divided in two parts, 11112 and 2121200, that added together give a palindrome (2132312).

The spelling of 111122121200 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred".