2131310213309 has 2 divisors, whose sum is σ = 2131310213310. Its totient is φ = 2131310213308.

The previous prime is 2131310213293. The next prime is 2131310213317. The reversal of 2131310213309 is 9033120131312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1293576396025 + 837733817284 = 1137355^2 + 915278^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131310213309 - 2⁴ = 2131310213293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131310213359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065655106654 + 1065655106655.

It is an arithmetic number, because the mean of its divisors is an integer number (1065655106655).

Almost surely, 2^{2131310213309} is an apocalyptic number.

It is an amenable number.

2131310213309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131310213309 is an equidigital number, since it uses as much as digits as its factorization.

2131310213309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The spelling of 2131310213309 in words is "two trillion, one hundred thirty-one billion, three hundred ten million, two hundred thirteen thousand, three hundred nine".