1311403123999 has 2 divisors, whose sum is σ = 1311403124000. Its totient is φ = 1311403123998.

The previous prime is 1311403123997. The next prime is 1311403124069. The reversal of 1311403123999 is 9993213041131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311403123999 - 2¹ = 1311403123997 is a prime.

Together with 1311403123997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311403123997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655701561999 + 655701562000.

It is an arithmetic number, because the mean of its divisors is an integer number (655701562000).

Almost surely, 2^{1311403123999} is an apocalyptic number.

1311403123999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311403123999 is an equidigital number, since it uses as much as digits as its factorization.

1311403123999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 46.

The spelling of 1311403123999 in words is "one trillion, three hundred eleven billion, four hundred three million, one hundred twenty-three thousand, nine hundred ninety-nine".