12239018243 has 2 divisors, whose sum is σ = 12239018244. Its totient is φ = 12239018242.

The previous prime is 12239018237. The next prime is 12239018261. The reversal of 12239018243 is 34281093221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12239018243 - 2⁶ = 12239018179 is a prime.

It is not a weakly prime, because it can be changed into another prime (12239018213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119509121 + 6119509122.

It is an arithmetic number, because the mean of its divisors is an integer number (6119509122).

Almost surely, 2^12239018243 is an apocalyptic number.

12239018243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12239018243 is an equidigital number, since it uses as much as digits as its factorization.

12239018243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 12239018243 in words is "twelve billion, two hundred thirty-nine million, eighteen thousand, two hundred forty-three".