111021120400 has 60 divisors (see below), whose sum is σ = 266828953600. Its totient is φ = 44391680640.

The previous prime is 111021120389. The next prime is 111021120407. The reversal of 111021120400 is 4021120111.

It is not an unprimeable number, because it can be changed into a prime (111021120407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1036561 + ... + 1138639.

Almost surely, 2^111021120400 is an apocalyptic number.

111021120400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021120400 is an abundant number, since it is smaller than the sum of its proper divisors (155807833200).

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

111021120400 is a wasteful number, since it uses less digits than its factorization.

111021120400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104816 (or 104805 counting only the distinct ones).

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

Adding to 111021120400 its reverse (4021120111), we get a palindrome (115042240511).

The spelling of 111021120400 in words is "one hundred eleven billion, twenty-one million, one hundred twenty thousand, four hundred".