2313121201309 has 2 divisors, whose sum is σ = 2313121201310. Its totient is φ = 2313121201308.

The previous prime is 2313121201301. The next prime is 2313121201333. The reversal of 2313121201309 is 9031021213132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1314870435684 + 998250765625 = 1146678^2 + 999125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2313121201309 - 2³ = 2313121201301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2313121201301) 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, 1156560600654 + 1156560600655.

It is an arithmetic number, because the mean of its divisors is an integer number (1156560600655).

Almost surely, 2^{2313121201309} is an apocalyptic number.

It is an amenable number.

2313121201309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2313121201309 is an equidigital number, since it uses as much as digits as its factorization.

2313121201309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 2313121201309 in words is "two trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred one thousand, three hundred nine".