121304123 has 2 divisors, whose sum is σ = 121304124. Its totient is φ = 121304122.

The previous prime is 121304101. The next prime is 121304153. The reversal of 121304123 is 321403121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121304123 - 2¹² = 121300027 is a prime.

It is not a weakly prime, because it can be changed into another prime (121304153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60652061 + 60652062.

It is an arithmetic number, because the mean of its divisors is an integer number (60652062).

Almost surely, 2^121304123 is an apocalyptic number.

121304123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121304123 is an equidigital number, since it uses as much as digits as its factorization.

121304123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121304123 is about 11013.8150974129. The cubic root of 121304123 is about 495.0227830210.

Adding to 121304123 its reverse (321403121), we get a palindrome (442707244).

The spelling of 121304123 in words is "one hundred twenty-one million, three hundred four thousand, one hundred twenty-three".