121311230009 has 2 divisors, whose sum is σ = 121311230010. Its totient is φ = 121311230008.

The previous prime is 121311229993. The next prime is 121311230011. The reversal of 121311230009 is 900032113121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105079705600 + 16231524409 = 324160^2 + 127403^2 .

It is a cyclic number.

It is not a de Polignac number, because 121311230009 - 2⁴ = 121311229993 is a prime.

It is a Sophie Germain prime.

Together with 121311230011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121311230069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655615004 + 60655615005.

It is an arithmetic number, because the mean of its divisors is an integer number (60655615005).

Almost surely, 2^121311230009 is an apocalyptic number.

It is an amenable number.

121311230009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311230009 is an equidigital number, since it uses as much as digits as its factorization.

121311230009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 121311230009 in words is "one hundred twenty-one billion, three hundred eleven million, two hundred thirty thousand, nine".