21120102011112 has 32 divisors (see below), whose sum is σ = 56861813107680. Its totient is φ = 6498492926400.

The previous prime is 21120102011101. The next prime is 21120102011137. The reversal of 21120102011112 is 21111020102112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21120102011091 and 21120102011100.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33846317014 + ... + 33846317637.

It is an arithmetic number, because the mean of its divisors is an integer number (1776931659615).

Almost surely, 2^{21120102011112} is an apocalyptic number.

It is an amenable number.

21120102011112 is an abundant number, since it is smaller than the sum of its proper divisors (35741711096568).

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

21120102011112 is a wasteful number, since it uses less digits than its factorization.

21120102011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67692634673 (or 67692634669 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21120102011112 its reverse (21111020102112), we get a palindrome (42231122113224).

The spelling of 21120102011112 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, eleven thousand, one hundred twelve".