21222000220208 has 20 divisors (see below), whose sum is σ = 41119266120408. Its totient is φ = 10610576705280.

The previous prime is 21222000220207. The next prime is 21222000220259. The reversal of 21222000220208 is 80202200022212.

It is not an unprimeable number, because it can be changed into a prime (21222000220207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26049098 + ... + 26851433.

Almost surely, 2^{21222000220208} is an apocalyptic number.

It is an amenable number.

21222000220208 is a deficient number, since it is larger than the sum of its proper divisors (19897265900200).

21222000220208 is a wasteful number, since it uses less digits than its factorization.

21222000220208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52925612 (or 52925606 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The spelling of 21222000220208 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty thousand, two hundred eight".