9993838121 has 8 divisors (see below), whose sum is σ = 10417137600. Its totient is φ = 9578601648.

The previous prime is 9993838117. The next prime is 9993838159. The reversal of 9993838121 is 1218383999.

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

It is a cyclic number.

It is not a de Polignac number, because 9993838121 - 2² = 9993838117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9993838181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2013221 + ... + 2018178.

It is an arithmetic number, because the mean of its divisors is an integer number (1302142200).

Almost surely, 2^9993838121 is an apocalyptic number.

It is an amenable number.

9993838121 is a deficient number, since it is larger than the sum of its proper divisors (423299479).

9993838121 is a wasteful number, since it uses less digits than its factorization.

9993838121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031503.

The product of its digits is 839808, while the sum is 53.

The square root of 9993838121 is about 99969.1858574431. The cubic root of 9993838121 is about 2153.9920869148.

The spelling of 9993838121 in words is "nine billion, nine hundred ninety-three million, eight hundred thirty-eight thousand, one hundred twenty-one".