21222120122200 has 96 divisors (see below), whose sum is σ = 49468724714160. Its totient is φ = 8466974208000.

The previous prime is 21222120122129. The next prime is 21222120122209. The reversal of 21222120122200 is 222102122212.

It is a super-2 number, since 2×21222120122200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222120122209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129611584 + ... + 129775216.

Almost surely, 2^{21222120122200} is an apocalyptic number.

21222120122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222120122200 is an abundant number, since it is smaller than the sum of its proper divisors (28246604591960).

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

21222120122200 is a wasteful number, since it uses less digits than its factorization.

21222120122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165317 (or 165308 counting only the distinct ones).

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

Adding to 21222120122200 its reverse (222102122212), we get a palindrome (21444222244412).

The spelling of 21222120122200 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, one hundred twenty-two thousand, two hundred".