13021300320521 has 2 divisors, whose sum is σ = 13021300320522. Its totient is φ = 13021300320520.

The previous prime is 13021300320499. The next prime is 13021300320559. The reversal of 13021300320521 is 12502300312031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12846919747600 + 174380572921 = 3584260^2 + 417589^2 .

It is an emirp because it is prime and its reverse (12502300312031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13021300320521 is a prime.

It is a super-2 number, since 2×13021300320521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13021300320421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510650160260 + 6510650160261.

It is an arithmetic number, because the mean of its divisors is an integer number (6510650160261).

Almost surely, 2^{13021300320521} is an apocalyptic number.

It is an amenable number.

13021300320521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13021300320521 is an equidigital number, since it uses as much as digits as its factorization.

13021300320521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 13021300320521 its reverse (12502300312031), we get a palindrome (25523600632552).

The spelling of 13021300320521 in words is "thirteen trillion, twenty-one billion, three hundred million, three hundred twenty thousand, five hundred twenty-one".