121210120112009 has 2 divisors, whose sum is σ = 121210120112010. Its totient is φ = 121210120112008.

The previous prime is 121210120111981. The next prime is 121210120112017. The reversal of 121210120112009 is 900211021012121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60934073136784 + 60276046975225 = 7806028^2 + 7763765^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210120112009 - 2⁴⁰ = 120110608484233 is a prime.

It is not a weakly prime, because it can be changed into another prime (121210120112909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605060056004 + 60605060056005.

It is an arithmetic number, because the mean of its divisors is an integer number (60605060056005).

Almost surely, 2^{121210120112009} is an apocalyptic number.

It is an amenable number.

121210120112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210120112009 is an equidigital number, since it uses as much as digits as its factorization.

121210120112009 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 23.

The spelling of 121210120112009 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, one hundred twelve thousand, nine".