21102222020112 has 120 divisors (see below), whose sum is σ = 59187836962176. Its totient is φ = 7018484848128.

The previous prime is 21102222020057. The next prime is 21102222020171. The reversal of 21102222020112 is 21102022220112.

It is a happy number.

21102222020112 is a `hidden beast` number, since 211 + 0 + 22 + 220 + 201 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 503287693 + ... + 503329619.

Almost surely, 2^{21102222020112} is an apocalyptic number.

It is an amenable number.

21102222020112 is an abundant number, since it is smaller than the sum of its proper divisors (38085614942064).

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

21102222020112 is a wasteful number, since it uses less digits than its factorization.

21102222020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49605 (or 49596 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21102222020112 its reverse (21102022220112), we get a palindrome (42204244240224).

The spelling of 21102222020112 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-two million, twenty thousand, one hundred twelve".