13017542621 has 2 divisors, whose sum is σ = 13017542622. Its totient is φ = 13017542620.

The previous prime is 13017542611. The next prime is 13017542647. The reversal of 13017542621 is 12624571031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12721358521 + 296184100 = 112789^2 + 17210^2 .

It is an emirp because it is prime and its reverse (12624571031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13017542621 - 2²² = 13013348317 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13017542611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6508771310 + 6508771311.

It is an arithmetic number, because the mean of its divisors is an integer number (6508771311).

Almost surely, 2^13017542621 is an apocalyptic number.

It is an amenable number.

13017542621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13017542621 is an equidigital number, since it uses as much as digits as its factorization.

13017542621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 13017542621 in words is "thirteen billion, seventeen million, five hundred forty-two thousand, six hundred twenty-one".