21010022112212 has 24 divisors (see below), whose sum is σ = 42023704193856. Its totient is φ = 9003510911808.

The previous prime is 21010022112193. The next prime is 21010022112221. The reversal of 21010022112212 is 21221122001012.

It is a congruent number.

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, 32351033 + ... + 32994080.

It is an arithmetic number, because the mean of its divisors is an integer number (1750987674744).

Almost surely, 2^{21010022112212} is an apocalyptic number.

It is an amenable number.

21010022112212 is an abundant number, since it is smaller than the sum of its proper divisors (21013682081644).

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

21010022112212 is a wasteful number, since it uses less digits than its factorization.

21010022112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65356607 (or 65356605 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21010022112212 its reverse (21221122001012), we get a palindrome (42231144113224).

The spelling of 21010022112212 in words is "twenty-one trillion, ten billion, twenty-two million, one hundred twelve thousand, two hundred twelve".