121220976655579 has 2 divisors, whose sum is σ = 121220976655580. Its totient is φ = 121220976655578.

The previous prime is 121220976655543. The next prime is 121220976655601. The reversal of 121220976655579 is 975556679022121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121220976655579 - 2⁷ = 121220976655451 is a prime.

It is not a weakly prime, because it can be changed into another prime (121220976655279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610488327789 + 60610488327790.

It is an arithmetic number, because the mean of its divisors is an integer number (60610488327790).

Almost surely, 2^{121220976655579} is an apocalyptic number.

121220976655579 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220976655579 is an equidigital number, since it uses as much as digits as its factorization.

121220976655579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884000, while the sum is 67.

The spelling of 121220976655579 in words is "one hundred twenty-one trillion, two hundred twenty billion, nine hundred seventy-six million, six hundred fifty-five thousand, five hundred seventy-nine".