12001122222 has 64 divisors (see below), whose sum is σ = 26268447744. Its totient is φ = 3640432640.

The previous prime is 12001122193. The next prime is 12001122223. The reversal of 12001122222 is 22222110021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001122223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382822 + ... + 412982.

It is an arithmetic number, because the mean of its divisors is an integer number (410444496).

Almost surely, 2^12001122222 is an apocalyptic number.

12001122222 is an abundant number, since it is smaller than the sum of its proper divisors (14267325522).

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

12001122222 is a wasteful number, since it uses less digits than its factorization.

12001122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30313.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12001122222 its reverse (22222110021), we get a palindrome (34223232243).

The spelling of 12001122222 in words is "twelve billion, one million, one hundred twenty-two thousand, two hundred twenty-two".