1321331012317 has 2 divisors, whose sum is σ = 1321331012318. Its totient is φ = 1321331012316.

The previous prime is 1321331012293. The next prime is 1321331012387. The reversal of 1321331012317 is 7132101331231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1123453724761 + 197877287556 = 1059931^2 + 444834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321331012317 - 2¹⁹ = 1321330488029 is a prime.

It is a super-2 number, since 2×1321331012317² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321331012387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660665506158 + 660665506159.

It is an arithmetic number, because the mean of its divisors is an integer number (660665506159).

Almost surely, 2^{1321331012317} is an apocalyptic number.

It is an amenable number.

1321331012317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321331012317 is an equidigital number, since it uses as much as digits as its factorization.

1321331012317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

Adding to 1321331012317 its reverse (7132101331231), we get a palindrome (8453432343548).

The spelling of 1321331012317 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, twelve thousand, three hundred seventeen".