2131321122317 has 2 divisors, whose sum is σ = 2131321122318. Its totient is φ = 2131321122316.

The previous prime is 2131321122179. The next prime is 2131321122341. The reversal of 2131321122317 is 7132211231312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2120690275081 + 10630847236 = 1456259^2 + 103106^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131321122317 - 2¹⁸ = 2131320860173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2131321122317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131321122517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065660561158 + 1065660561159.

It is an arithmetic number, because the mean of its divisors is an integer number (1065660561159).

Almost surely, 2^{2131321122317} is an apocalyptic number.

It is an amenable number.

2131321122317 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131321122317 is an equidigital number, since it uses as much as digits as its factorization.

2131321122317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

Adding to 2131321122317 its reverse (7132211231312), we get a palindrome (9263532353629).

The spelling of 2131321122317 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, three hundred seventeen".