121967198 has 4 divisors (see below), whose sum is σ = 182950800. Its totient is φ = 60983598.

The previous prime is 121967179. The next prime is 121967201. The reversal of 121967198 is 891769121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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, 30491798 + ... + 30491801.

It is an arithmetic number, because the mean of its divisors is an integer number (45737700).

Almost surely, 2^121967198 is an apocalyptic number.

121967198 is a deficient number, since it is larger than the sum of its proper divisors (60983602).

121967198 is an equidigital number, since it uses as much as digits as its factorization.

121967198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60983601.

The product of its digits is 54432, while the sum is 44.

The square root of 121967198 is about 11043.8760405937. The cubic root of 121967198 is about 495.9231123231.

The spelling of 121967198 in words is "one hundred twenty-one million, nine hundred sixty-seven thousand, one hundred ninety-eight".