12221002222 has 64 divisors (see below), whose sum is σ = 22257607680. Its totient is φ = 4958352000.

The previous prime is 12221002147. The next prime is 12221002223. The reversal of 12221002222 is 22220012221.

It is a junction number, because it is equal to n+sod(n) for n = 12221002196 and 12221002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221002223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1237179 + ... + 1247017.

It is an arithmetic number, because the mean of its divisors is an integer number (347775120).

Almost surely, 2^12221002222 is an apocalyptic number.

12221002222 is a deficient number, since it is larger than the sum of its proper divisors (10036605458).

12221002222 is a wasteful number, since it uses less digits than its factorization.

12221002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12221002222 its reverse (22220012221), we get a palindrome (34441014443).

Subtracting 12221002222 from its reverse (22220012221), we obtain a palindrome (9999009999).

The spelling of 12221002222 in words is "twelve billion, two hundred twenty-one million, two thousand, two hundred twenty-two".