121098 has 8 divisors (see below), whose sum is σ = 242208. Its totient is φ = 40364.

The previous prime is 121081. The next prime is 121123. The reversal of 121098 is 890121.

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

121098 is an admirable number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

121098 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10086 + ... + 10097.

It is an arithmetic number, because the mean of its divisors is an integer number (30276).

2¹²¹⁰⁹⁸ is an apocalyptic number.

121098 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121098 is a wasteful number, since it uses less digits than its factorization.

121098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20188.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 121098 is about 347.9913792036. The cubic root of 121098 is about 49.4742239027.

The spelling of 121098 in words is "one hundred twenty-one thousand, ninety-eight".