21224521623364 has 12 divisors (see below), whose sum is σ = 37185265085164. Its totient is φ = 10600160170464.

The previous prime is 21224521623329. The next prime is 21224521623401. The reversal of 21224521623364 is 46332612542212.

It can be written as a sum of positive squares in 2 ways, for example, as 13639135334400 + 7585386288964 = 3693120^2 + 2754158^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21224521623364.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3025156359 + ... + 3025163374.

Almost surely, 2^{21224521623364} is an apocalyptic number.

It is an amenable number.

21224521623364 is a deficient number, since it is larger than the sum of its proper divisors (15960743461800).

21224521623364 is a wasteful number, since it uses less digits than its factorization.

21224521623364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6050320614 (or 6050320612 counting only the distinct ones).

The product of its digits is 829440, while the sum is 43.

The spelling of 21224521623364 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twenty-one million, six hundred twenty-three thousand, three hundred sixty-four".