12214621 has 4 divisors (see below), whose sum is σ = 12224700. Its totient is φ = 12204544.

The previous prime is 12214613. The next prime is 12214639. The reversal of 12214621 is 12641221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2044900 + 10169721 = 1430^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 12214621 - 2³ = 12214613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12214681) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2926 + ... + 5743.

It is an arithmetic number, because the mean of its divisors is an integer number (3056175).

Almost surely, 2^12214621 is an apocalyptic number.

It is an amenable number.

12214621 is a deficient number, since it is larger than the sum of its proper divisors (10079).

12214621 is an equidigital number, since it uses as much as digits as its factorization.

12214621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10078.

The product of its digits is 192, while the sum is 19.

The square root of 12214621 is about 3494.9422026695. The cubic root of 12214621 is about 230.2996786770.

Adding to 12214621 its reverse (12641221), we get a palindrome (24855842).

The spelling of 12214621 in words is "twelve million, two hundred fourteen thousand, six hundred twenty-one".