21220000121022 has 64 divisors (see below), whose sum is σ = 45129494808576. Its totient is φ = 6636859623680.

The previous prime is 21220000120997. The next prime is 21220000121041. The reversal of 21220000121022 is 22012100002212.

It is a junction number, because it is equal to n+sod(n) for n = 21220000120992 and 21220000121010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37982218 + ... + 38536850.

It is an arithmetic number, because the mean of its divisors is an integer number (705148356384).

Almost surely, 2^{21220000121022} is an apocalyptic number.

21220000121022 is an abundant number, since it is smaller than the sum of its proper divisors (23909494687554).

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

21220000121022 is a wasteful number, since it uses less digits than its factorization.

21220000121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559945.

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

Adding to 21220000121022 its reverse (22012100002212), we get a palindrome (43232100123234).

The spelling of 21220000121022 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-one thousand, twenty-two".