12131308243 has 2 divisors, whose sum is σ = 12131308244. Its totient is φ = 12131308242.

The previous prime is 12131308223. The next prime is 12131308283. The reversal of 12131308243 is 34280313121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12131308243 - 2⁹ = 12131307731 is a prime.

It is not a weakly prime, because it can be changed into another prime (12131308223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065654121 + 6065654122.

It is an arithmetic number, because the mean of its divisors is an integer number (6065654122).

Almost surely, 2^12131308243 is an apocalyptic number.

12131308243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131308243 is an equidigital number, since it uses as much as digits as its factorization.

12131308243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 12131308243 in words is "twelve billion, one hundred thirty-one million, three hundred eight thousand, two hundred forty-three".