1312320202321 has 2 divisors, whose sum is σ = 1312320202322. Its totient is φ = 1312320202320.

The previous prime is 1312320202313. The next prime is 1312320202367. The reversal of 1312320202321 is 1232020232131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062631105600 + 249689096721 = 1030840^2 + 499689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312320202321 - 2³ = 1312320202313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312320202292 and 1312320202301.

It is not a weakly prime, because it can be changed into another prime (1312320202381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656160101160 + 656160101161.

It is an arithmetic number, because the mean of its divisors is an integer number (656160101161).

Almost surely, 2^{1312320202321} is an apocalyptic number.

It is an amenable number.

1312320202321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312320202321 is an equidigital number, since it uses as much as digits as its factorization.

1312320202321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1312320202321 its reverse (1232020232131), we get a palindrome (2544340434452).

The spelling of 1312320202321 in words is "one trillion, three hundred twelve billion, three hundred twenty million, two hundred two thousand, three hundred twenty-one".