12222221022 has 96 divisors (see below), whose sum is σ = 30181821696. Its totient is φ = 3538339200.

The previous prime is 12222220993. The next prime is 12222221027. The reversal of 12222221022 is 22012222221.

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 = 12222220986 and 12222221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222221027) 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, 6971298 + ... + 6973050.

It is an arithmetic number, because the mean of its divisors is an integer number (314393976).

Almost surely, 2^12222221022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12222221022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15090910848).

12222221022 is an abundant number, since it is smaller than the sum of its proper divisors (17959600674).

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

12222221022 is a wasteful number, since it uses less digits than its factorization.

12222221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326 (or 3323 counting only the distinct ones).

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

Adding to 12222221022 its reverse (22012222221), we get a palindrome (34234443243).

The spelling of 12222221022 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-two".