12221283204 has 288 divisors, whose sum is σ = 36264848256. Its totient is φ = 3436646400.

The previous prime is 12221283181. The next prime is 12221283229. The reversal of 12221283204 is 40238212221.

12221283204 is a `hidden beast` number, since 122 + 212 + 8 + 320 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53838139 + ... + 53838365.

It is an arithmetic number, because the mean of its divisors is an integer number (125919612).

Almost surely, 2^12221283204 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 12221283204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18132424128).

12221283204 is an abundant number, since it is smaller than the sum of its proper divisors (24043565052).

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

12221283204 is a wasteful number, since it uses less digits than its factorization.

12221283204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 12221283204 its reverse (40238212221), we get a palindrome (52459495425).

The spelling of 12221283204 in words is "twelve billion, two hundred twenty-one million, two hundred eighty-three thousand, two hundred four".