1312311302123 has 2 divisors, whose sum is σ = 1312311302124. Its totient is φ = 1312311302122.

The previous prime is 1312311302111. The next prime is 1312311302153. The reversal of 1312311302123 is 3212031132131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312311302123 - 2²⁴ = 1312294524907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312311302153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656155651061 + 656155651062.

It is an arithmetic number, because the mean of its divisors is an integer number (656155651062).

Almost surely, 2^{1312311302123} is an apocalyptic number.

1312311302123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312311302123 is an equidigital number, since it uses as much as digits as its factorization.

1312311302123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1312311302123 its reverse (3212031132131), we get a palindrome (4524342434254).

The spelling of 1312311302123 in words is "one trillion, three hundred twelve billion, three hundred eleven million, three hundred two thousand, one hundred twenty-three".