121997353 has 2 divisors, whose sum is σ = 121997354. Its totient is φ = 121997352.

The previous prime is 121997339. The next prime is 121997357. The reversal of 121997353 is 353799121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90782784 + 31214569 = 9528^2 + 5587^2 .

It is a cyclic number.

It is not a de Polignac number, because 121997353 - 2¹⁷ = 121866281 is a prime.

It is not a weakly prime, because it can be changed into another prime (121997357) 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, 60998676 + 60998677.

It is an arithmetic number, because the mean of its divisors is an integer number (60998677).

Almost surely, 2^121997353 is an apocalyptic number.

It is an amenable number.

121997353 is a deficient number, since it is larger than the sum of its proper divisors (1).

121997353 is an equidigital number, since it uses as much as digits as its factorization.

121997353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 121997353 is about 11045.2411924774. The cubic root of 121997353 is about 495.9639794016.

The spelling of 121997353 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, three hundred fifty-three".