12012281 has 2 divisors, whose sum is σ = 12012282. Its totient is φ = 12012280.

The previous prime is 12012271. The next prime is 12012289. The reversal of 12012281 is 18221021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6175225 + 5837056 = 2485^2 + 2416^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012281 - 2¹⁰ = 12011257 is a prime.

It is a super-2 number, since 2×12012281² = 288589789645922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12012289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006140 + 6006141.

It is an arithmetic number, because the mean of its divisors is an integer number (6006141).

Almost surely, 2^12012281 is an apocalyptic number.

It is an amenable number.

12012281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012281 is an equidigital number, since it uses as much as digits as its factorization.

12012281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 12012281 is about 3465.8737715041. The cubic root of 12012281 is about 229.0209231914.

The spelling of 12012281 in words is "twelve million, twelve thousand, two hundred eighty-one".