1312023000991 has 2 divisors, whose sum is σ = 1312023000992. Its totient is φ = 1312023000990.

The previous prime is 1312023000961. The next prime is 1312023001019. The reversal of 1312023000991 is 1990003202131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312023000991 - 2¹¹ = 1312022998943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312023000931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656011500495 + 656011500496.

It is an arithmetic number, because the mean of its divisors is an integer number (656011500496).

Almost surely, 2^{1312023000991} is an apocalyptic number.

1312023000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312023000991 is an equidigital number, since it uses as much as digits as its factorization.

1312023000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 1312023000991 in words is "one trillion, three hundred twelve billion, twenty-three million, nine hundred ninety-one", and thus it is an aban number.