121130309 has 2 divisors, whose sum is σ = 121130310. Its totient is φ = 121130308.

The previous prime is 121130279. The next prime is 121130311. The reversal of 121130309 is 903031121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68973025 + 52157284 = 8305^2 + 7222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121130309 is a prime.

It is a Sophie Germain prime.

Together with 121130311, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121139309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565154 + 60565155.

It is an arithmetic number, because the mean of its divisors is an integer number (60565155).

Almost surely, 2^121130309 is an apocalyptic number.

It is an amenable number.

121130309 is a deficient number, since it is larger than the sum of its proper divisors (1).

121130309 is an equidigital number, since it uses as much as digits as its factorization.

121130309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 121130309 is about 11005.9215425152. The cubic root of 121130309 is about 494.7862342639.

The spelling of 121130309 in words is "one hundred twenty-one million, one hundred thirty thousand, three hundred nine".