21102122122212 has 24 divisors (see below), whose sum is σ = 49241090883712. Its totient is φ = 7033639860000.

The previous prime is 21102122122141. The next prime is 21102122122223. The reversal of 21102122122212 is 21222122120112.

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, 49886539 + ... + 50307762.

Almost surely, 2^{21102122122212} is an apocalyptic number.

It is an amenable number.

21102122122212 is an abundant number, since it is smaller than the sum of its proper divisors (28138968761500).

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

21102122122212 is a wasteful number, since it uses less digits than its factorization.

21102122122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100211859 (or 100211857 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21102122122212 its reverse (21222122120112), we get a palindrome (42324244242324).

The spelling of 21102122122212 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred twelve".