121398297 has 16 divisors (see below), whose sum is σ = 163303872. Its totient is φ = 80216640.

The previous prime is 121398293. The next prime is 121398323. The reversal of 121398297 is 792893121.

It is not a de Polignac number, because 121398297 - 2² = 121398293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121398293) 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 in 15 ways as a sum of consecutive naturals, for example, 288147 + ... + 288567.

It is an arithmetic number, because the mean of its divisors is an integer number (10206492).

Almost surely, 2^121398297 is an apocalyptic number.

It is an amenable number.

121398297 is a deficient number, since it is larger than the sum of its proper divisors (41905575).

121398297 is a wasteful number, since it uses less digits than its factorization.

121398297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048.

The product of its digits is 54432, while the sum is 42.

The square root of 121398297 is about 11018.0895349421. The cubic root of 121398297 is about 495.1508529103.

The spelling of 121398297 in words is "one hundred twenty-one million, three hundred ninety-eight thousand, two hundred ninety-seven".