12222211122 has 64 divisors (see below), whose sum is σ = 29704809600. Its totient is φ = 3694299840.

The previous prime is 12222211097. The next prime is 12222211123. The reversal of 12222211122 is 22111222221.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12222211095 and 12222211104.

It is not an unprimeable number, because it can be changed into a prime (12222211123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209904 + ... + 261732.

It is an arithmetic number, because the mean of its divisors is an integer number (464137650).

Almost surely, 2^12222211122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12222211122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14852404800).

12222211122 is an abundant number, since it is smaller than the sum of its proper divisors (17482598478).

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

12222211122 is a wasteful number, since it uses less digits than its factorization.

12222211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52248 (or 52242 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 12222211122 its reverse (22111222221), we get a palindrome (34333433343).

The spelling of 12222211122 in words is "twelve billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twenty-two".