121312297 has 2 divisors, whose sum is σ = 121312298. Its totient is φ = 121312296.

The previous prime is 121312291. The next prime is 121312339. The reversal of 121312297 is 792213121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106172416 + 15139881 = 10304^2 + 3891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121312297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121312291) 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, 60656148 + 60656149.

It is an arithmetic number, because the mean of its divisors is an integer number (60656149).

Almost surely, 2^121312297 is an apocalyptic number.

It is an amenable number.

121312297 is a deficient number, since it is larger than the sum of its proper divisors (1).

121312297 is an equidigital number, since it uses as much as digits as its factorization.

121312297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 121312297 is about 11014.1861705711. The cubic root of 121312297 is about 495.0339017015.

The spelling of 121312297 in words is "one hundred twenty-one million, three hundred twelve thousand, two hundred ninety-seven".