121242923 has 2 divisors, whose sum is σ = 121242924. Its totient is φ = 121242922.

The previous prime is 121242917. The next prime is 121242941. The reversal of 121242923 is 329242121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121242923 - 2⁴ = 121242907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121242892 and 121242901.

It is not a weakly prime, because it can be changed into another prime (121242943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60621461 + 60621462.

It is an arithmetic number, because the mean of its divisors is an integer number (60621462).

Almost surely, 2^121242923 is an apocalyptic number.

121242923 is a deficient number, since it is larger than the sum of its proper divisors (1).

121242923 is an equidigital number, since it uses as much as digits as its factorization.

121242923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 121242923 is about 11011.0364180671. The cubic root of 121242923 is about 494.9395198698.

The spelling of 121242923 in words is "one hundred twenty-one million, two hundred forty-two thousand, nine hundred twenty-three".