12221326 has 32 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 5316960.

The previous prime is 12221273. The next prime is 12221327. The reversal of 12221326 is 62312221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63891 + ... + 64081.

It is an arithmetic number, because the mean of its divisors is an integer number (653184).

Almost surely, 2^12221326 is an apocalyptic number.

12221326 is a deficient number, since it is larger than the sum of its proper divisors (8680562).

12221326 is a wasteful number, since it uses less digits than its factorization.

12221326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336.

The product of its digits is 288, while the sum is 19.

The square root of 12221326 is about 3495.9013143966. The cubic root of 12221326 is about 230.3418106129.

Adding to 12221326 its reverse (62312221), we get a palindrome (74533547).

The spelling of 12221326 in words is "twelve million, two hundred twenty-one thousand, three hundred twenty-six".