13211302231261 has 2 divisors, whose sum is σ = 13211302231262. Its totient is φ = 13211302231260.

The previous prime is 13211302231241. The next prime is 13211302231333. The reversal of 13211302231261 is 16213220311231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11775844244025 + 1435457987236 = 3431595^2 + 1198106^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211302231261 - 2⁵ = 13211302231229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13211302231241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605651115630 + 6605651115631.

It is an arithmetic number, because the mean of its divisors is an integer number (6605651115631).

Almost surely, 2^{13211302231261} is an apocalyptic number.

It is an amenable number.

13211302231261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211302231261 is an equidigital number, since it uses as much as digits as its factorization.

13211302231261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 13211302231261 its reverse (16213220311231), we get a palindrome (29424522542492).

The spelling of 13211302231261 in words is "thirteen trillion, two hundred eleven billion, three hundred two million, two hundred thirty-one thousand, two hundred sixty-one".