121209353 has 2 divisors, whose sum is σ = 121209354. Its totient is φ = 121209352.

The previous prime is 121209331. The next prime is 121209359. The reversal of 121209353 is 353902121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97081609 + 24127744 = 9853^2 + 4912^2 .

It is a cyclic number.

It is not a de Polignac number, because 121209353 - 2⁶ = 121209289 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121209359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60604676 + 60604677.

It is an arithmetic number, because the mean of its divisors is an integer number (60604677).

Almost surely, 2^121209353 is an apocalyptic number.

It is an amenable number.

121209353 is a deficient number, since it is larger than the sum of its proper divisors (1).

121209353 is an equidigital number, since it uses as much as digits as its factorization.

121209353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 121209353 is about 11009.5119328697. The cubic root of 121209353 is about 494.8938356820.

The spelling of 121209353 in words is "one hundred twenty-one million, two hundred nine thousand, three hundred fifty-three".