12081133 has 4 divisors (see below), whose sum is σ = 12109468. Its totient is φ = 12052800.

The previous prime is 12081119. The next prime is 12081143. The reversal of 12081133 is 33118021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33118021 = 71 ⋅466451.

It can be written as a sum of positive squares in 2 ways, for example, as 6215049 + 5866084 = 2493^2 + 2422^2 .

It is a cyclic number.

It is not a de Polignac number, because 12081133 - 2¹⁷ = 11950061 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 12081133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13518 + ... + 14383.

It is an arithmetic number, because the mean of its divisors is an integer number (3027367).

Almost surely, 2^12081133 is an apocalyptic number.

It is an amenable number.

12081133 is a deficient number, since it is larger than the sum of its proper divisors (28335).

12081133 is an equidigital number, since it uses as much as digits as its factorization.

12081133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28334.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12081133 is about 3475.7924276343. The cubic root of 12081133 is about 229.4576572522.

Adding to 12081133 its reverse (33118021), we get a palindrome (45199154).

The spelling of 12081133 in words is "twelve million, eighty-one thousand, one hundred thirty-three".