12212644 has 6 divisors (see below), whose sum is σ = 21372134. Its totient is φ = 6106320.

The previous prime is 12212623. The next prime is 12212657. The reversal of 12212644 is 44621221.

It is a happy number.

12212644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9684544 + 2528100 = 3112^2 + 1590^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1526577 + ... + 1526584.

Almost surely, 2^12212644 is an apocalyptic number.

It is an amenable number.

12212644 is a deficient number, since it is larger than the sum of its proper divisors (9159490).

12212644 is a wasteful number, since it uses less digits than its factorization.

12212644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053165 (or 3053163 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 12212644 is about 3494.6593539285. The cubic root of 12212644 is about 230.2872529393.

Adding to 12212644 its reverse (44621221), we get a palindrome (56833865).

The spelling of 12212644 in words is "twelve million, two hundred twelve thousand, six hundred forty-four".