1312203023309 has 2 divisors, whose sum is σ = 1312203023310. Its totient is φ = 1312203023308.

The previous prime is 1312203023293. The next prime is 1312203023357. The reversal of 1312203023309 is 9033203022131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1290609602500 + 21593420809 = 1136050^2 + 146947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312203023309 - 2⁴ = 1312203023293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312203083309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656101511654 + 656101511655.

It is an arithmetic number, because the mean of its divisors is an integer number (656101511655).

Almost surely, 2^{1312203023309} is an apocalyptic number.

It is an amenable number.

1312203023309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312203023309 is an equidigital number, since it uses as much as digits as its factorization.

1312203023309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 1312203023309 in words is "one trillion, three hundred twelve billion, two hundred three million, twenty-three thousand, three hundred nine".