12221984 has 12 divisors (see below), whose sum is σ = 24062094. Its totient is φ = 6110976.

The previous prime is 12221981. The next prime is 12222013. The reversal of 12221984 is 48912221.

12221984 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., 8880400 + 3341584 = 2980^2 + 1828^2 .

It is not an unprimeable number, because it can be changed into a prime (12221981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190937 + ... + 191000.

Almost surely, 2^12221984 is an apocalyptic number.

It is an amenable number.

12221984 is a deficient number, since it is larger than the sum of its proper divisors (11840110).

12221984 is an equidigital number, since it uses as much as digits as its factorization.

12221984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381947 (or 381939 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 12221984 is about 3495.9954233380. The cubic root of 12221984 is about 230.3459444303.

The spelling of 12221984 in words is "twelve million, two hundred twenty-one thousand, nine hundred eighty-four".