21332224513 has 2 divisors, whose sum is σ = 21332224514. Its totient is φ = 21332224512.

The previous prime is 21332224477. The next prime is 21332224567. The reversal of 21332224513 is 31542223312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13435591744 + 7896632769 = 115912^2 + 88863^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332224513 is a prime.

It is not a weakly prime, because it can be changed into another prime (21332224813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666112256 + 10666112257.

It is an arithmetic number, because the mean of its divisors is an integer number (10666112257).

Almost surely, 2^21332224513 is an apocalyptic number.

It is an amenable number.

21332224513 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332224513 is an equidigital number, since it uses as much as digits as its factorization.

21332224513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

Adding to 21332224513 its reverse (31542223312), we get a palindrome (52874447825).

The spelling of 21332224513 in words is "twenty-one billion, three hundred thirty-two million, two hundred twenty-four thousand, five hundred thirteen".