12221744 has 10 divisors (see below), whose sum is σ = 23679660. Its totient is φ = 6110864.

The previous prime is 12221689. The next prime is 12221749. The reversal of 12221744 is 44712221.

It is a super-3 number, since 3×12221744³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12221749) 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 as a sum of consecutive naturals, namely, 381914 + ... + 381945.

It is an arithmetic number, because the mean of its divisors is an integer number (2367966).

Almost surely, 2^12221744 is an apocalyptic number.

It is an amenable number.

12221744 is a deficient number, since it is larger than the sum of its proper divisors (11457916).

12221744 is an equidigital number, since it uses as much as digits as its factorization.

12221744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763867 (or 763861 counting only the distinct ones).

The product of its digits is 896, while the sum is 23.

The square root of 12221744 is about 3495.9610981817. The cubic root of 12221744 is about 230.3444366721.

Adding to 12221744 its reverse (44712221), we get a palindrome (56933965).

The spelling of 12221744 in words is "twelve million, two hundred twenty-one thousand, seven hundred forty-four".