12222012222 has 96 divisors (see below), whose sum is σ = 30881882304. Its totient is φ = 3421440000.

The previous prime is 12222012217. The next prime is 12222012223. The reversal of 12222012222 is 22221022221.

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

It is a junction number, because it is equal to n+sod(n) for n = 12222012195 and 12222012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222012223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1229472 + ... + 1239372.

It is an arithmetic number, because the mean of its divisors is an integer number (321686274).

Almost surely, 2^12222012222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12222012222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15440941152).

12222012222 is an abundant number, since it is smaller than the sum of its proper divisors (18659870082).

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

12222012222 is a wasteful number, since it uses less digits than its factorization.

12222012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10114 (or 10111 counting only the distinct ones).

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

Adding to 12222012222 its reverse (22221022221), we get a palindrome (34443034443).

Subtracting 12222012222 from its reverse (22221022221), we obtain a palindrome (9999009999).

The spelling of 12222012222 in words is "twelve billion, two hundred twenty-two million, twelve thousand, two hundred twenty-two".