12221140224 has 72 divisors (see below), whose sum is σ = 32550945280. Its totient is φ = 4070596608.

The previous prime is 12221140201. The next prime is 12221140273. The reversal of 12221140224 is 42204112221.

It is a self number, because there is not a number n which added to its sum of digits gives 12221140224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1138209 + ... + 1148895.

Almost surely, 2^12221140224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221140224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16275472640).

12221140224 is an abundant number, since it is smaller than the sum of its proper divisors (20329805056).

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

12221140224 is a wasteful number, since it uses less digits than its factorization.

12221140224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12195 (or 12181 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12221140224 its reverse (42204112221), we get a palindrome (54425252445).

The spelling of 12221140224 in words is "twelve billion, two hundred twenty-one million, one hundred forty thousand, two hundred twenty-four".