12221122232 has 128 divisors (see below), whose sum is σ = 26649907200. Its totient is φ = 5201280000.

The previous prime is 12221122229. The next prime is 12221122241. The reversal of 12221122232 is 23222112221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28355057 + ... + 28355487.

It is an arithmetic number, because the mean of its divisors is an integer number (208202400).

Almost surely, 2^12221122232 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 12221122232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13324953600).

12221122232 is an abundant number, since it is smaller than the sum of its proper divisors (14428784968).

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

12221122232 is a wasteful number, since it uses less digits than its factorization.

12221122232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 785 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

Adding to 12221122232 its reverse (23222112221), we get a palindrome (35443234453).

The spelling of 12221122232 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred thirty-two".