121340123 has 2 divisors, whose sum is σ = 121340124. Its totient is φ = 121340122.

The previous prime is 121340117. The next prime is 121340159. The reversal of 121340123 is 321043121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121340123 - 2²⁰ = 120291547 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121340423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670061 + 60670062.

It is an arithmetic number, because the mean of its divisors is an integer number (60670062).

Almost surely, 2^121340123 is an apocalyptic number.

121340123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340123 is an equidigital number, since it uses as much as digits as its factorization.

121340123 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 121340123 is about 11015.4492872511. The cubic root of 121340123 is about 495.0717482640.

Adding to 121340123 its reverse (321043121), we get a palindrome (442383244).

The spelling of 121340123 in words is "one hundred twenty-one million, three hundred forty thousand, one hundred twenty-three".