12033121 has 4 divisors (see below), whose sum is σ = 12121092. Its totient is φ = 11945152.

The previous prime is 12033107. The next prime is 12033167. The reversal of 12033121 is 12133021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7623121 + 4410000 = 2761^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 12033121 - 2¹⁵ = 12000353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12033221) 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, 43780 + ... + 44053.

It is an arithmetic number, because the mean of its divisors is an integer number (3030273).

Almost surely, 2^12033121 is an apocalyptic number.

It is an amenable number.

12033121 is a deficient number, since it is larger than the sum of its proper divisors (87971).

12033121 is an equidigital number, since it uses as much as digits as its factorization.

12033121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87970.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12033121 is about 3468.8789255320. The cubic root of 12033121 is about 229.1532887985.

Adding to 12033121 its reverse (12133021), we get a palindrome (24166142).

The spelling of 12033121 in words is "twelve million, thirty-three thousand, one hundred twenty-one".