121020198 has 32 divisors (see below), whose sum is σ = 261544416. Its totient is φ = 37110528.

The previous prime is 121020191. The next prime is 121020209. The reversal of 121020198 is 891020121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020191) 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, 21936 + ... + 26892.

It is an arithmetic number, because the mean of its divisors is an integer number (8173263).

Almost surely, 2^121020198 is an apocalyptic number.

121020198 is an abundant number, since it is smaller than the sum of its proper divisors (140524218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121020198 is a wasteful number, since it uses less digits than its factorization.

121020198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 121020198 is about 11000.9180525991. The cubic root of 121020198 is about 494.6362637508.

The spelling of 121020198 in words is "one hundred twenty-one million, twenty thousand, one hundred ninety-eight".