121801099 has 8 divisors (see below), whose sum is σ = 139298528. Its totient is φ = 104328000.

The previous prime is 121801091. The next prime is 121801103. The reversal of 121801099 is 990108121.

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

It is not a de Polignac number, because 121801099 - 2³ = 121801091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121801099.

It is not an unprimeable number, because it can be changed into a prime (121801091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6349 + ... + 16849.

It is an arithmetic number, because the mean of its divisors is an integer number (17412316).

Almost surely, 2^121801099 is an apocalyptic number.

121801099 is a deficient number, since it is larger than the sum of its proper divisors (17497429).

121801099 is a wasteful number, since it uses less digits than its factorization.

121801099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12165.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 121801099 is about 11036.3535191656. The cubic root of 121801099 is about 495.6978885056.

The spelling of 121801099 in words is "one hundred twenty-one million, eight hundred one thousand, ninety-nine".