1312221012331 has 2 divisors, whose sum is σ = 1312221012332. Its totient is φ = 1312221012330.

The previous prime is 1312221012317. The next prime is 1312221012337. The reversal of 1312221012331 is 1332101222131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312221012331 - 2⁹ = 1312221011819 is a prime.

It is a super-2 number, since 2×1312221012331² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312221012337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656110506165 + 656110506166.

It is an arithmetic number, because the mean of its divisors is an integer number (656110506166).

Almost surely, 2^{1312221012331} is an apocalyptic number.

1312221012331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312221012331 is an equidigital number, since it uses as much as digits as its factorization.

1312221012331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1312221012331 its reverse (1332101222131), we get a palindrome (2644322234462).

The spelling of 1312221012331 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, twelve thousand, three hundred thirty-one".