121198 has 16 divisors (see below), whose sum is σ = 226944. Its totient is φ = 47160.

The previous prime is 121189. The next prime is 121229. The reversal of 121198 is 891121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 240 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (14184).

2¹²¹¹⁹⁸ is an apocalyptic number.

121198 is a deficient number, since it is larger than the sum of its proper divisors (105746).

121198 is a wasteful number, since it uses less digits than its factorization.

121198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807.

The product of its digits is 144, while the sum is 22.

The square root of 121198 is about 348.1350312738. The cubic root of 121198 is about 49.4878383890.

The spelling of 121198 in words is "one hundred twenty-one thousand, one hundred ninety-eight".