21022122304 has 14 divisors (see below), whose sum is σ = 41715774074. Its totient is φ = 10511061120.

The previous prime is 21022122271. The next prime is 21022122311. The reversal of 21022122304 is 40322122012.

It can be written as a sum of positive squares in only one way, i.e., 11681286400 + 9340835904 = 108080^2 + 96648^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164235267 + ... + 164235394.

Almost surely, 2^21022122304 is an apocalyptic number.

It is an amenable number.

21022122304 is a deficient number, since it is larger than the sum of its proper divisors (20693651770).

21022122304 is an equidigital number, since it uses as much as digits as its factorization.

21022122304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328470673 (or 328470663 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21022122304 its reverse (40322122012), we get a palindrome (61344244316).

The spelling of 21022122304 in words is "twenty-one billion, twenty-two million, one hundred twenty-two thousand, three hundred four".