21163122212112 has 60 divisors (see below), whose sum is σ = 59232425812300. Its totient is φ = 7053769384704.

The previous prime is 21163122212041. The next prime is 21163122212149. The reversal of 21163122212112 is 21121222136112.

21163122212112 is a `hidden beast` number, since 2 + 1 + 1 + 631 + 2 + 2 + 2 + 1 + 21 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12430955371536 + 8732166840576 = 3525756^2 + 2955024^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4611487 + ... + 7974462.

Almost surely, 2^{21163122212112} is an apocalyptic number.

It is an amenable number.

21163122212112 is an abundant number, since it is smaller than the sum of its proper divisors (38069303600188).

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

21163122212112 is a wasteful number, since it uses less digits than its factorization.

21163122212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12597640 (or 12597631 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

Adding to 21163122212112 its reverse (21121222136112), we get a palindrome (42284344348224).

The spelling of 21163122212112 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twelve".