121834620247 has 2 divisors, whose sum is σ = 121834620248. Its totient is φ = 121834620246.

The previous prime is 121834620233. The next prime is 121834620289. The reversal of 121834620247 is 742026438121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121834620247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121834620547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60917310123 + 60917310124.

It is an arithmetic number, because the mean of its divisors is an integer number (60917310124).

Almost surely, 2^121834620247 is an apocalyptic number.

121834620247 is a deficient number, since it is larger than the sum of its proper divisors (1).

121834620247 is an equidigital number, since it uses as much as digits as its factorization.

121834620247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 121834620247 in words is "one hundred twenty-one billion, eight hundred thirty-four million, six hundred twenty thousand, two hundred forty-seven".