21110202212112 has 60 divisors (see below), whose sum is σ = 63623803894924. Its totient is φ = 6495446833920.

The previous prime is 21110202212093. The next prime is 21110202212161. The reversal of 21110202212112 is 21121220201112.

21110202212112 is a `hidden beast` number, since 211 + 1 + 0 + 20 + 221 + 211 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9422665172496 + 11687537039616 = 3069636^2 + 3418704^2 .

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 11 ways as a sum of consecutive naturals, for example, 5638406839 + ... + 5638410582.

Almost surely, 2^{21110202212112} is an apocalyptic number.

It is an amenable number.

21110202212112 is an abundant number, since it is smaller than the sum of its proper divisors (42513601682812).

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

21110202212112 is a wasteful number, since it uses less digits than its factorization.

21110202212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11276817448 (or 11276817439 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21110202212112 its reverse (21121220201112), we get a palindrome (42231422413224).

The spelling of 21110202212112 in words is "twenty-one trillion, one hundred ten billion, two hundred two million, two hundred twelve thousand, one hundred twelve".