121981298 has 8 divisors (see below), whose sum is σ = 183738240. Its totient is φ = 60735220.

The previous prime is 121981297. The next prime is 121981303. The reversal of 121981298 is 892189121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121981291) 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 3 ways as a sum of consecutive naturals, for example, 127118 + ... + 128073.

It is an arithmetic number, because the mean of its divisors is an integer number (22967280).

Almost surely, 2^121981298 is an apocalyptic number.

121981298 is a deficient number, since it is larger than the sum of its proper divisors (61756942).

121981298 is a wasteful number, since it uses less digits than its factorization.

121981298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255432.

The product of its digits is 20736, while the sum is 41.

The square root of 121981298 is about 11044.5143849786. The cubic root of 121981298 is about 495.9422219595.

The spelling of 121981298 in words is "one hundred twenty-one million, nine hundred eighty-one thousand, two hundred ninety-eight".