198830121 has 16 divisors (see below), whose sum is σ = 303203328. Its totient is φ = 113533200.

The previous prime is 198830081. The next prime is 198830131. The reversal of 198830121 is 121038891.

It is not a de Polignac number, because 198830121 - 2¹⁷ = 198699049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198830131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35866 + ... + 41036.

It is an arithmetic number, because the mean of its divisors is an integer number (18950208).

Almost surely, 2^198830121 is an apocalyptic number.

It is an amenable number.

198830121 is a deficient number, since it is larger than the sum of its proper divisors (104373207).

198830121 is a wasteful number, since it uses less digits than its factorization.

198830121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7012.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 198830121 is about 14100.7134925861. The cubic root of 198830121 is about 583.6610681514.

The spelling of 198830121 in words is "one hundred ninety-eight million, eight hundred thirty thousand, one hundred twenty-one".