1312251120091 has 2 divisors, whose sum is σ = 1312251120092. Its totient is φ = 1312251120090.

The previous prime is 1312251120079. The next prime is 1312251120149. The reversal of 1312251120091 is 1900211522131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312251120091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312251160091) 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, 656125560045 + 656125560046.

It is an arithmetic number, because the mean of its divisors is an integer number (656125560046).

Almost surely, 2^{1312251120091} is an apocalyptic number.

1312251120091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312251120091 is an equidigital number, since it uses as much as digits as its factorization.

1312251120091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 1312251120091 in words is "one trillion, three hundred twelve billion, two hundred fifty-one million, one hundred twenty thousand, ninety-one".