21120133112 has 16 divisors (see below), whose sum is σ = 42646422840. Its totient is φ = 9747753696.

The previous prime is 21120133109. The next prime is 21120133117. The reversal of 21120133112 is 21133102112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120133117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101538998 + ... + 101539205.

Almost surely, 2^21120133112 is an apocalyptic number.

It is an amenable number.

21120133112 is an abundant number, since it is smaller than the sum of its proper divisors (21526289728).

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

21120133112 is a wasteful number, since it uses less digits than its factorization.

21120133112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203078222 (or 203078218 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21120133112 its reverse (21133102112), we get a palindrome (42253235224).

The spelling of 21120133112 in words is "twenty-one billion, one hundred twenty million, one hundred thirty-three thousand, one hundred twelve".