13121220210613 has 2 divisors, whose sum is σ = 13121220210614. Its totient is φ = 13121220210612.

The previous prime is 13121220210577. The next prime is 13121220210629. The reversal of 13121220210613 is 31601202212131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6716711922244 + 6404508288369 = 2591662^2 + 2530713^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121220210613 - 2²⁵ = 13121186656181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13121220210913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560610105306 + 6560610105307.

It is an arithmetic number, because the mean of its divisors is an integer number (6560610105307).

Almost surely, 2^{13121220210613} is an apocalyptic number.

It is an amenable number.

13121220210613 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121220210613 is an equidigital number, since it uses as much as digits as its factorization.

13121220210613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 13121220210613 its reverse (31601202212131), we get a palindrome (44722422422744).

The spelling of 13121220210613 in words is "thirteen trillion, one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, six hundred thirteen".