9996121 has 4 divisors (see below), whose sum is σ = 10002852. Its totient is φ = 9989392.

The previous prime is 9996089. The next prime is 9996137. The reversal of 9996121 is 1216999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4888521 + 5107600 = 2211^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 9996121 - 2⁵ = 9996089 is a prime.

It is a Duffinian number.

9996121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9990121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (2500713).

Almost surely, 2^9996121 is an apocalyptic number.

It is an amenable number.

9996121 is a deficient number, since it is larger than the sum of its proper divisors (6731).

9996121 is a wasteful number, since it uses less digits than its factorization.

9996121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6730.

The product of its digits is 8748, while the sum is 37.

The square root of 9996121 is about 3161.6642769276. The cubic root of 9996121 is about 215.4156085600.

The spelling of 9996121 in words is "nine million, nine hundred ninety-six thousand, one hundred twenty-one".