13140345155321 has 2 divisors, whose sum is σ = 13140345155322. Its totient is φ = 13140345155320.

The previous prime is 13140345155297. The next prime is 13140345155401. The reversal of 13140345155321 is 12355154304131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11967967275625 + 1172377879696 = 3459475^2 + 1082764^2 .

It is a cyclic number.

It is not a de Polignac number, because 13140345155321 - 2⁴² = 8742298644217 is a prime.

It is a super-2 number, since 2×13140345155321² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13140345155621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6570172577660 + 6570172577661.

It is an arithmetic number, because the mean of its divisors is an integer number (6570172577661).

Almost surely, 2^{13140345155321} is an apocalyptic number.

It is an amenable number.

13140345155321 is a deficient number, since it is larger than the sum of its proper divisors (1).

13140345155321 is an equidigital number, since it uses as much as digits as its factorization.

13140345155321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 13140345155321 its reverse (12355154304131), we get a palindrome (25495499459452).

The spelling of 13140345155321 in words is "thirteen trillion, one hundred forty billion, three hundred forty-five million, one hundred fifty-five thousand, three hundred twenty-one".