12012271 has 2 divisors, whose sum is σ = 12012272. Its totient is φ = 12012270.

The previous prime is 12012263. The next prime is 12012281. The reversal of 12012271 is 17221021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12012271 - 2³ = 12012263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006135 + 6006136.

It is an arithmetic number, because the mean of its divisors is an integer number (6006136).

Almost surely, 2^12012271 is an apocalyptic number.

12012271 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012271 is an equidigital number, since it uses as much as digits as its factorization.

12012271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12012271 is about 3465.8723288661. The cubic root of 12012271 is about 229.0208596395.

Adding to 12012271 its reverse (17221021), we get a palindrome (29233292).

The spelling of 12012271 in words is "twelve million, twelve thousand, two hundred seventy-one".