12212866 has 8 divisors (see below), whose sum is σ = 18342144. Its totient is φ = 6098820.

The previous prime is 12212861. The next prime is 12212867. The reversal of 12212866 is 66821221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12212861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (2292768).

Almost surely, 2^12212866 is an apocalyptic number.

12212866 is a deficient number, since it is larger than the sum of its proper divisors (6129278).

12212866 is an equidigital number, since it uses as much as digits as its factorization.

12212866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616.

The product of its digits is 2304, while the sum is 28.

The square root of 12212866 is about 3494.6911165366. The cubic root of 12212866 is about 230.2886483090.

It can be divided in two parts, 12 and 212866, that added together give a triangular number (212878 = T₆₅₂).

The spelling of 12212866 in words is "twelve million, two hundred twelve thousand, eight hundred sixty-six".