12115660243 has 2 divisors, whose sum is σ = 12115660244. Its totient is φ = 12115660242.

The previous prime is 12115660237. The next prime is 12115660259. The reversal of 12115660243 is 34206651121.

It is a happy number.

12115660243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12115660243 - 2⁵ = 12115660211 is a prime.

It is not a weakly prime, because it can be changed into another prime (12115660643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6057830121 + 6057830122.

It is an arithmetic number, because the mean of its divisors is an integer number (6057830122).

Almost surely, 2^12115660243 is an apocalyptic number.

12115660243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12115660243 is an equidigital number, since it uses as much as digits as its factorization.

12115660243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 12115660243 in words is "twelve billion, one hundred fifteen million, six hundred sixty thousand, two hundred forty-three".