121984993321 has 2 divisors, whose sum is σ = 121984993322. Its totient is φ = 121984993320.

The previous prime is 121984993243. The next prime is 121984993343. The reversal of 121984993321 is 123399489121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100365408025 + 21619585296 = 316805^2 + 147036^2 .

It is a cyclic number.

It is not a de Polignac number, because 121984993321 - 2¹⁵ = 121984960553 is a prime.

It is not a weakly prime, because it can be changed into another prime (121984993391) 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, 60992496660 + 60992496661.

It is an arithmetic number, because the mean of its divisors is an integer number (60992496661).

Almost surely, 2^121984993321 is an apocalyptic number.

It is an amenable number.

121984993321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121984993321 is an equidigital number, since it uses as much as digits as its factorization.

121984993321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 52.

The spelling of 121984993321 in words is "one hundred twenty-one billion, nine hundred eighty-four million, nine hundred ninety-three thousand, three hundred twenty-one".