121220121983 has 2 divisors, whose sum is σ = 121220121984. Its totient is φ = 121220121982.

The previous prime is 121220121977. The next prime is 121220122043. The reversal of 121220121983 is 389121022121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121220121983 - 2⁸ = 121220121727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220121683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610060991 + 60610060992.

It is an arithmetic number, because the mean of its divisors is an integer number (60610060992).

Almost surely, 2^121220121983 is an apocalyptic number.

121220121983 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220121983 is an equidigital number, since it uses as much as digits as its factorization.

121220121983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 121220121983 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, nine hundred eighty-three".