21120212011200 has 168 divisors, whose sum is σ = 71681271755280. Its totient is φ = 5437847654400.

The previous prime is 21120212011187. The next prime is 21120212011309. The reversal of 21120212011200 is 211021202112.

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 21120212011200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75723631 + ... + 76002030.

Almost surely, 2^{21120212011200} is an apocalyptic number.

21120212011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120212011200 is an abundant number, since it is smaller than the sum of its proper divisors (50561059744080).

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

21120212011200 is a wasteful number, since it uses less digits than its factorization.

21120212011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151725715 (or 151725700 counting only the distinct ones).

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

Adding to 21120212011200 its reverse (211021202112), we get a palindrome (21331233213312).

The spelling of 21120212011200 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, eleven thousand, two hundred".