231012331211309 has 2 divisors, whose sum is σ = 231012331211310. Its totient is φ = 231012331211308.

The previous prime is 231012331211237. The next prime is 231012331211353. The reversal of 231012331211309 is 903112133210132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230723279818084 + 289051393225 = 15189578^2 + 537635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231012331211309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231012331213309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115506165605654 + 115506165605655.

It is an arithmetic number, because the mean of its divisors is an integer number (115506165605655).

Almost surely, 2^{231012331211309} is an apocalyptic number.

It is an amenable number.

231012331211309 is a deficient number, since it is larger than the sum of its proper divisors (1).

231012331211309 is an equidigital number, since it uses as much as digits as its factorization.

231012331211309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 231012331211309 in words is "two hundred thirty-one trillion, twelve billion, three hundred thirty-one million, two hundred eleven thousand, three hundred nine".