12004121 has 4 divisors (see below), whose sum is σ = 12013092. Its totient is φ = 11995152.

The previous prime is 12004117. The next prime is 12004163. The reversal of 12004121 is 12140021.

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 198025 + 11806096 = 445^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 12004121 - 2² = 12004117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12004171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2030 + ... + 5303.

It is an arithmetic number, because the mean of its divisors is an integer number (3003273).

Almost surely, 2^12004121 is an apocalyptic number.

It is an amenable number.

12004121 is a deficient number, since it is larger than the sum of its proper divisors (8971).

12004121 is an equidigital number, since it uses as much as digits as its factorization.

12004121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8970.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12004121 is about 3464.6963791940. The cubic root of 12004121 is about 228.9690531078.

Adding to 12004121 its reverse (12140021), we get a palindrome (24144142).

The spelling of 12004121 in words is "twelve million, four thousand, one hundred twenty-one".