121220945223439 has 2 divisors, whose sum is σ = 121220945223440. Its totient is φ = 121220945223438.

The previous prime is 121220945223431. The next prime is 121220945223449. The reversal of 121220945223439 is 934322549022121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121220945223439 - 2³ = 121220945223431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121220945223392 and 121220945223401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220945223431) 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, 60610472611719 + 60610472611720.

It is an arithmetic number, because the mean of its divisors is an integer number (60610472611720).

Almost surely, 2^{121220945223439} is an apocalyptic number.

121220945223439 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220945223439 is an equidigital number, since it uses as much as digits as its factorization.

121220945223439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 121220945223439 in words is "one hundred twenty-one trillion, two hundred twenty billion, nine hundred forty-five million, two hundred twenty-three thousand, four hundred thirty-nine".