21120022100112 has 80 divisors (see below), whose sum is σ = 58784560755648. Its totient is φ = 6495418437120.

The previous prime is 21120022100063. The next prime is 21120022100129. The reversal of 21120022100112 is 21100122002112.

It is a junction number, because it is equal to n+sod(n) for n = 21120022100091 and 21120022100100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6611643 + ... + 9271130.

Almost surely, 2^{21120022100112} is an apocalyptic number.

It is an amenable number.

21120022100112 is an abundant number, since it is smaller than the sum of its proper divisors (37664538655536).

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

21120022100112 is a wasteful number, since it uses less digits than its factorization.

21120022100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15884928 (or 15884922 counting only the distinct ones).

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

Adding to 21120022100112 its reverse (21100122002112), we get a palindrome (42220144102224).

The spelling of 21120022100112 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, one hundred thousand, one hundred twelve".