121321029959 has 2 divisors, whose sum is σ = 121321029960. Its totient is φ = 121321029958.

The previous prime is 121321029889. The next prime is 121321030073. The reversal of 121321029959 is 959920123121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121321029959 - 2²⁰ = 121319981383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121321229959) 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, 60660514979 + 60660514980.

It is an arithmetic number, because the mean of its divisors is an integer number (60660514980).

Almost surely, 2^121321029959 is an apocalyptic number.

121321029959 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321029959 is an equidigital number, since it uses as much as digits as its factorization.

121321029959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 44.

The spelling of 121321029959 in words is "one hundred twenty-one billion, three hundred twenty-one million, twenty-nine thousand, nine hundred fifty-nine".