12221344 has 12 divisors (see below), whose sum is σ = 24060834. Its totient is φ = 6110656.

The previous prime is 12221333. The next prime is 12221353. The reversal of 12221344 is 44312221.

It can be written as a sum of positive squares in only one way, i.e., 10316944 + 1904400 = 3212^2 + 1380^2 .

It is a super-2 number, since 2×12221344² = 298722498332672, which contains 22 as substring.

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, 190927 + ... + 190990.

Almost surely, 2^12221344 is an apocalyptic number.

It is an amenable number.

12221344 is a deficient number, since it is larger than the sum of its proper divisors (11839490).

12221344 is an equidigital number, since it uses as much as digits as its factorization.

12221344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381927 (or 381919 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 12221344 is about 3495.9038888391. The cubic root of 12221344 is about 230.3419236980.

Adding to 12221344 its reverse (44312221), we get a palindrome (56533565).

It can be divided in two parts, 12221 and 344, that multiplied together give a palindrome (4204024).

The spelling of 12221344 in words is "twelve million, two hundred twenty-one thousand, three hundred forty-four".