21222002220200 has 24 divisors (see below), whose sum is σ = 49341155162430. Its totient is φ = 8488800888000.

The previous prime is 21222002220193. The next prime is 21222002220233. The reversal of 21222002220200 is 202220022212.

It can be written as a sum of positive squares in 3 ways, for example, as 17587404862756 + 3634597357444 = 4193734^2 + 1906462^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53055005351 + ... + 53055005750.

Almost surely, 2^{21222002220200} is an apocalyptic number.

21222002220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222002220200 is an abundant number, since it is smaller than the sum of its proper divisors (28119152942230).

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

21222002220200 is a wasteful number, since it uses less digits than its factorization.

21222002220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106110011117 (or 106110011108 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21222002220200 its reverse (202220022212), we get a palindrome (21424222242412).

The spelling of 21222002220200 in words is "twenty-one trillion, two hundred twenty-two billion, two million, two hundred twenty thousand, two hundred".