13215322510321 has 2 divisors, whose sum is σ = 13215322510322. Its totient is φ = 13215322510320.

The previous prime is 13215322510279. The next prime is 13215322510343. The reversal of 13215322510321 is 12301522351231.

It is a happy number.

13215322510321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13092637640625 + 122684869696 = 3618375^2 + 350264^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215322510321 - 2¹⁹ = 13215321986033 is a prime.

It is not a weakly prime, because it can be changed into another prime (13215322510381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607661255160 + 6607661255161.

It is an arithmetic number, because the mean of its divisors is an integer number (6607661255161).

Almost surely, 2^{13215322510321} is an apocalyptic number.

It is an amenable number.

13215322510321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215322510321 is an equidigital number, since it uses as much as digits as its factorization.

13215322510321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 13215322510321 its reverse (12301522351231), we get a palindrome (25516844861552).

The spelling of 13215322510321 in words is "thirteen trillion, two hundred fifteen billion, three hundred twenty-two million, five hundred ten thousand, three hundred twenty-one".