121340343209 has 2 divisors, whose sum is σ = 121340343210. Its totient is φ = 121340343208.

The previous prime is 121340343203. The next prime is 121340343253. The reversal of 121340343209 is 902343043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92657533609 + 28682809600 = 304397^2 + 169360^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340343209 - 2²⁰ = 121339294633 is a prime.

It is not a weakly prime, because it can be changed into another prime (121340343203) 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, 60670171604 + 60670171605.

It is an arithmetic number, because the mean of its divisors is an integer number (60670171605).

Almost surely, 2^121340343209 is an apocalyptic number.

It is an amenable number.

121340343209 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340343209 is an equidigital number, since it uses as much as digits as its factorization.

121340343209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 121340343209 in words is "one hundred twenty-one billion, three hundred forty million, three hundred forty-three thousand, two hundred nine".