121243236239 has 2 divisors, whose sum is σ = 121243236240. Its totient is φ = 121243236238.

The previous prime is 121243236187. The next prime is 121243236263. The reversal of 121243236239 is 932632342121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121243236239 - 2²⁰ = 121242187663 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121243236269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621618119 + 60621618120.

It is an arithmetic number, because the mean of its divisors is an integer number (60621618120).

Almost surely, 2^121243236239 is an apocalyptic number.

121243236239 is a deficient number, since it is larger than the sum of its proper divisors (1).

121243236239 is an equidigital number, since it uses as much as digits as its factorization.

121243236239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 38.

The spelling of 121243236239 in words is "one hundred twenty-one billion, two hundred forty-three million, two hundred thirty-six thousand, two hundred thirty-nine".