21222334432424 has 64 divisors (see below), whose sum is σ = 43585629603840. Its totient is φ = 9643945006080.

The previous prime is 21222334432379. The next prime is 21222334432547. The reversal of 21222334432424 is 42423443322212.

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, 3484019 + ... + 7388034.

It is an arithmetic number, because the mean of its divisors is an integer number (681025462560).

Almost surely, 2^{21222334432424} is an apocalyptic number.

It is an amenable number.

21222334432424 is an abundant number, since it is smaller than the sum of its proper divisors (22363295171416).

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

21222334432424 is a wasteful number, since it uses less digits than its factorization.

21222334432424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10872570 (or 10872566 counting only the distinct ones).

The product of its digits is 442368, while the sum is 38.

Adding to 21222334432424 its reverse (42423443322212), we get a palindrome (63645777754636).

The spelling of 21222334432424 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred thirty-four million, four hundred thirty-two thousand, four hundred twenty-four".