21224202513 has 16 divisors (see below), whose sum is σ = 28594063680. Its totient is φ = 14002297344.

The previous prime is 21224202497. The next prime is 21224202523. The reversal of 21224202513 is 31520242212.

It is not a de Polignac number, because 21224202513 - 2⁴ = 21224202497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21224202523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169293 + ... + 266661.

It is an arithmetic number, because the mean of its divisors is an integer number (1787128980).

Almost surely, 2^21224202513 is an apocalyptic number.

It is an amenable number.

21224202513 is a deficient number, since it is larger than the sum of its proper divisors (7369861167).

21224202513 is a wasteful number, since it uses less digits than its factorization.

21224202513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98128.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21224202513 its reverse (31520242212), we get a palindrome (52744444725).

The spelling of 21224202513 in words is "twenty-one billion, two hundred twenty-four million, two hundred two thousand, five hundred thirteen".