21062244521 has 16 divisors (see below), whose sum is σ = 21829946880. Its totient is φ = 20307991680.

The previous prime is 21062244499. The next prime is 21062244523. The reversal of 21062244521 is 12544226012.

It is a cyclic number.

It is not a de Polignac number, because 21062244521 - 2³⁴ = 3882375337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21062244523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1262591 + ... + 1279163.

It is an arithmetic number, because the mean of its divisors is an integer number (1364371680).

Almost surely, 2^21062244521 is an apocalyptic number.

It is an amenable number.

21062244521 is a deficient number, since it is larger than the sum of its proper divisors (767702359).

21062244521 is a wasteful number, since it uses less digits than its factorization.

21062244521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16976.

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 21062244521 in words is "twenty-one billion, sixty-two million, two hundred forty-four thousand, five hundred twenty-one".