12222201204 has 72 divisors (see below), whose sum is σ = 32932153800. Its totient is φ = 3808653312.

The previous prime is 12222201203. The next prime is 12222201223. The reversal of 12222201204 is 40210222221.

It can be written as a sum of positive squares in 4 ways, for example, as 1500012900 + 10722188304 = 38730^2 + 103548^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222201203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24172 + ... + 158204.

It is an arithmetic number, because the mean of its divisors is an integer number (457391025).

Almost surely, 2^12222201204 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 12222201204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16466076900).

12222201204 is an abundant number, since it is smaller than the sum of its proper divisors (20709952596).

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

12222201204 is a wasteful number, since it uses less digits than its factorization.

12222201204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134209 (or 134204 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12222201204 its reverse (40210222221), we get a palindrome (52432423425).

The spelling of 12222201204 in words is "twelve billion, two hundred twenty-two million, two hundred one thousand, two hundred four".