21222010022212 has 12 divisors (see below), whose sum is σ = 37138573728256. Its totient is φ = 10610988957000.

The previous prime is 21222010022111. The next prime is 21222010022231. The reversal of 21222010022212 is 21222001022212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222010022212.

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, 743148 + ... + 6557155.

Almost surely, 2^{21222010022212} is an apocalyptic number.

It is an amenable number.

21222010022212 is a deficient number, since it is larger than the sum of its proper divisors (15916563706044).

21222010022212 is a wasteful number, since it uses less digits than its factorization.

21222010022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8027058 (or 8027056 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222010022212 its reverse (21222001022212), we get a palindrome (42444011044424).

Subtracting from 21222010022212 its reverse (21222001022212), we obtain a square (9000000 = 3000²).

The spelling of 21222010022212 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, twenty-two thousand, two hundred twelve".