13321403261 has 2 divisors, whose sum is σ = 13321403262. Its totient is φ = 13321403260.

The previous prime is 13321403239. The next prime is 13321403267. The reversal of 13321403261 is 16230412331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8047884100 + 5273519161 = 89710^2 + 72619^2 .

It is a cyclic number.

It is not a de Polignac number, because 13321403261 - 2⁶ = 13321403197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13321403261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13321403267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6660701630 + 6660701631.

It is an arithmetic number, because the mean of its divisors is an integer number (6660701631).

Almost surely, 2^13321403261 is an apocalyptic number.

It is an amenable number.

13321403261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13321403261 is an equidigital number, since it uses as much as digits as its factorization.

13321403261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 13321403261 its reverse (16230412331), we get a palindrome (29551815592).

The spelling of 13321403261 in words is "thirteen billion, three hundred twenty-one million, four hundred three thousand, two hundred sixty-one".