12221300 has 144 divisors (see below), whose sum is σ = 34997760. Its totient is φ = 3594240.

The previous prime is 12221273. The next prime is 12221327. The reversal of 12221300 is 312221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12221273) and next prime (12221327).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154661 + ... + 154739.

It is an arithmetic number, because the mean of its divisors is an integer number (243040).

Almost surely, 2^12221300 is an apocalyptic number.

12221300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17498880).

12221300 is an abundant number, since it is smaller than the sum of its proper divisors (22776460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221300 is a wasteful number, since it uses less digits than its factorization.

12221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12221300 is about 3495.8975957542. The cubic root of 12221300 is about 230.3416472675.

Adding to 12221300 its reverse (312221), we get a palindrome (12533521).

It can be divided in two parts, 12221 and 300, that added together give a palindrome (12521).

The spelling of 12221300 in words is "twelve million, two hundred twenty-one thousand, three hundred".