21222022112212 has 12 divisors (see below), whose sum is σ = 37138958246656. Its totient is φ = 10610891184600.

The previous prime is 21222022112209. The next prime is 21222022112243. The reversal of 21222022112212 is 21221122022212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29568948 + ... + 30278155.

Almost surely, 2^{21222022112212} is an apocalyptic number.

It is an amenable number.

21222022112212 is a deficient number, since it is larger than the sum of its proper divisors (15916936134444).

21222022112212 is a wasteful number, since it uses less digits than its factorization.

21222022112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59935758 (or 59935756 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21222022112212 its reverse (21221122022212), we get a palindrome (42443144134424).

The spelling of 21222022112212 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, one hundred twelve thousand, two hundred twelve".