12412221 has 8 divisors (see below), whose sum is σ = 16710720. Its totient is φ = 8194272.

The previous prime is 12412199. The next prime is 12412237. The reversal of 12412221 is 12221421.

12412221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12412221 - 2¹⁴ = 12395837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12412221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12412241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19776 + ... + 20393.

It is an arithmetic number, because the mean of its divisors is an integer number (2088840).

Almost surely, 2^12412221 is an apocalyptic number.

It is an amenable number.

12412221 is a deficient number, since it is larger than the sum of its proper divisors (4298499).

12412221 is a wasteful number, since it uses less digits than its factorization.

12412221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40275.

The product of its digits is 64, while the sum is 15.

The square root of 12412221 is about 3523.0982103824. The cubic root of 12412221 is about 231.5349197138.

Adding to 12412221 its reverse (12221421), we get a palindrome (24633642).

The spelling of 12412221 in words is "twelve million, four hundred twelve thousand, two hundred twenty-one".