121242312439 has 2 divisors, whose sum is σ = 121242312440. Its totient is φ = 121242312438.

The previous prime is 121242312407. The next prime is 121242312449. The reversal of 121242312439 is 934213242121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121242312439 - 2⁵ = 121242312407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121242312449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621156219 + 60621156220.

It is an arithmetic number, because the mean of its divisors is an integer number (60621156220).

Almost surely, 2^121242312439 is an apocalyptic number.

121242312439 is a deficient number, since it is larger than the sum of its proper divisors (1).

121242312439 is an equidigital number, since it uses as much as digits as its factorization.

121242312439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The spelling of 121242312439 in words is "one hundred twenty-one billion, two hundred forty-two million, three hundred twelve thousand, four hundred thirty-nine".