13265651242321 has 2 divisors, whose sum is σ = 13265651242322. Its totient is φ = 13265651242320.

The previous prime is 13265651242273. The next prime is 13265651242343. The reversal of 13265651242321 is 12324215656231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12070510341696 + 1195140900625 = 3474264^2 + 1093225^2 .

It is a cyclic number.

It is not a de Polignac number, because 13265651242321 - 2⁴¹ = 11066627986769 is a prime.

It is a super-2 number, since 2×13265651242321² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13265651242351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6632825621160 + 6632825621161.

It is an arithmetic number, because the mean of its divisors is an integer number (6632825621161).

Almost surely, 2^{13265651242321} is an apocalyptic number.

It is an amenable number.

13265651242321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13265651242321 is an equidigital number, since it uses as much as digits as its factorization.

13265651242321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 43.

Adding to 13265651242321 its reverse (12324215656231), we get a palindrome (25589866898552).

The spelling of 13265651242321 in words is "thirteen trillion, two hundred sixty-five billion, six hundred fifty-one million, two hundred forty-two thousand, three hundred twenty-one".