121012210211209 has 2 divisors, whose sum is σ = 121012210211210. Its totient is φ = 121012210211208.

The previous prime is 121012210211171. The next prime is 121012210211279. The reversal of 121012210211209 is 902112012210121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93090233195584 + 27921977015625 = 9648328^2 + 5284125^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012210211209 - 2¹⁷ = 121012210080137 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012210211279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506105105604 + 60506105105605.

It is an arithmetic number, because the mean of its divisors is an integer number (60506105105605).

Almost surely, 2^{121012210211209} is an apocalyptic number.

It is an amenable number.

121012210211209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012210211209 is an equidigital number, since it uses as much as digits as its factorization.

121012210211209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 121012210211209 in words is "one hundred twenty-one trillion, twelve billion, two hundred ten million, two hundred eleven thousand, two hundred nine".