13130313129721 has 2 divisors, whose sum is σ = 13130313129722. Its totient is φ = 13130313129720.

The previous prime is 13130313129701. The next prime is 13130313129733. The reversal of 13130313129721 is 12792131303131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12708119874025 + 422193255696 = 3564845^2 + 649764^2 .

It is a cyclic number.

It is not a de Polignac number, because 13130313129721 - 2³¹ = 13128165646073 is a prime.

It is not a weakly prime, because it can be changed into another prime (13130313129701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565156564860 + 6565156564861.

It is an arithmetic number, because the mean of its divisors is an integer number (6565156564861).

Almost surely, 2^{13130313129721} is an apocalyptic number.

It is an amenable number.

13130313129721 is a deficient number, since it is larger than the sum of its proper divisors (1).

13130313129721 is an equidigital number, since it uses as much as digits as its factorization.

13130313129721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The spelling of 13130313129721 in words is "thirteen trillion, one hundred thirty billion, three hundred thirteen million, one hundred twenty-nine thousand, seven hundred twenty-one".