121328904959 has 2 divisors, whose sum is σ = 121328904960. Its totient is φ = 121328904958.

The previous prime is 121328904923. The next prime is 121328904989. The reversal of 121328904959 is 959409823121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121328904959 - 2⁸ = 121328904703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121328904959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121328904989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60664452479 + 60664452480.

It is an arithmetic number, because the mean of its divisors is an integer number (60664452480).

Almost surely, 2^121328904959 is an apocalyptic number.

121328904959 is a deficient number, since it is larger than the sum of its proper divisors (1).

121328904959 is an equidigital number, since it uses as much as digits as its factorization.

121328904959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 121328904959 in words is "one hundred twenty-one billion, three hundred twenty-eight million, nine hundred four thousand, nine hundred fifty-nine".