12021266 has 4 divisors (see below), whose sum is σ = 18031902. Its totient is φ = 6010632.

The previous prime is 12021259. The next prime is 12021287. The reversal of 12021266 is 66212021.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 10857025 + 1164241 = 3295^2 + 1079^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3005315 + ... + 3005318.

Almost surely, 2^12021266 is an apocalyptic number.

12021266 is a deficient number, since it is larger than the sum of its proper divisors (6010636).

12021266 is an equidigital number, since it uses as much as digits as its factorization.

12021266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010635.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12021266 is about 3467.1697391388. The cubic root of 12021266 is about 229.0780103272.

Adding to 12021266 its reverse (66212021), we get a palindrome (78233287).

The spelling of 12021266 in words is "twelve million, twenty-one thousand, two hundred sixty-six".