1312331223443 has 2 divisors, whose sum is σ = 1312331223444. Its totient is φ = 1312331223442.

The previous prime is 1312331223439. The next prime is 1312331223523. The reversal of 1312331223443 is 3443221332131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312331223443 - 2² = 1312331223439 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312321223443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656165611721 + 656165611722.

It is an arithmetic number, because the mean of its divisors is an integer number (656165611722).

Almost surely, 2^{1312331223443} is an apocalyptic number.

1312331223443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312331223443 is an equidigital number, since it uses as much as digits as its factorization.

1312331223443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 32.

Adding to 1312331223443 its reverse (3443221332131), we get a palindrome (4755552555574).

The spelling of 1312331223443 in words is "one trillion, three hundred twelve billion, three hundred thirty-one million, two hundred twenty-three thousand, four hundred forty-three".