1311310323331 has 2 divisors, whose sum is σ = 1311310323332. Its totient is φ = 1311310323330.

The previous prime is 1311310323329. The next prime is 1311310323473. The reversal of 1311310323331 is 1333230131131.

It is a weak prime.

It is an emirp because it is prime and its reverse (1333230131131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311310323331 - 2¹ = 1311310323329 is a prime.

It is a super-2 number, since 2×1311310323331² (a number of 25 digits) contains 22 as substring.

Together with 1311310323329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1311310323296 and 1311310323305.

It is not a weakly prime, because it can be changed into another prime (1311310323311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655655161665 + 655655161666.

It is an arithmetic number, because the mean of its divisors is an integer number (655655161666).

Almost surely, 2^{1311310323331} is an apocalyptic number.

1311310323331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311310323331 is an equidigital number, since it uses as much as digits as its factorization.

1311310323331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 1311310323331 its reverse (1333230131131), we get a palindrome (2644540454462).

The spelling of 1311310323331 in words is "one trillion, three hundred eleven billion, three hundred ten million, three hundred twenty-three thousand, three hundred thirty-one".