2312131112209 has 2 divisors, whose sum is σ = 2312131112210. Its totient is φ = 2312131112208.

The previous prime is 2312131112191. The next prime is 2312131112227. The reversal of 2312131112209 is 9022111312132.

It is a balanced prime because it is at equal distance from previous prime (2312131112191) and next prime (2312131112227).

It can be written as a sum of positive squares in only one way, i.e., 2039826650625 + 272304461584 = 1428225^2 + 521828^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312131112209 - 2⁴¹ = 113107856657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2312131112509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156065556104 + 1156065556105.

It is an arithmetic number, because the mean of its divisors is an integer number (1156065556105).

Almost surely, 2^{2312131112209} is an apocalyptic number.

It is an amenable number.

2312131112209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312131112209 is an equidigital number, since it uses as much as digits as its factorization.

2312131112209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 2312131112209 in words is "two trillion, three hundred twelve billion, one hundred thirty-one million, one hundred twelve thousand, two hundred nine".