21222010212 has 48 divisors (see below), whose sum is σ = 53382628992. Its totient is φ = 6523050240.

The previous prime is 21222010193. The next prime is 21222010223. The reversal of 21222010212 is 21201022212.

It is a junction number, because it is equal to n+sod(n) for n = 21222010191 and 21222010200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80512 + ... + 221192.

It is an arithmetic number, because the mean of its divisors is an integer number (1112138104).

Almost surely, 2^21222010212 is an apocalyptic number.

It is an amenable number.

21222010212 is an abundant number, since it is smaller than the sum of its proper divisors (32160618780).

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

21222010212 is a wasteful number, since it uses less digits than its factorization.

21222010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141668 (or 141666 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21222010212 its reverse (21201022212), we get a palindrome (42423032424).

The spelling of 21222010212 in words is "twenty-one billion, two hundred twenty-two million, ten thousand, two hundred twelve".