13134640621 has 2 divisors, whose sum is σ = 13134640622. Its totient is φ = 13134640620.

The previous prime is 13134640601. The next prime is 13134640679. The reversal of 13134640621 is 12604643131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12915186025 + 219454596 = 113645^2 + 14814^2 .

It is an emirp because it is prime and its reverse (12604643131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13134640621 - 2¹⁵ = 13134607853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13134640601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6567320310 + 6567320311.

It is an arithmetic number, because the mean of its divisors is an integer number (6567320311).

Almost surely, 2^13134640621 is an apocalyptic number.

It is an amenable number.

13134640621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13134640621 is an equidigital number, since it uses as much as digits as its factorization.

13134640621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 13134640621 in words is "thirteen billion, one hundred thirty-four million, six hundred forty thousand, six hundred twenty-one".