12001122212222 has 64 divisors (see below), whose sum is σ = 21595031607744. Its totient is φ = 4930204631040.

The previous prime is 12001122212221. The next prime is 12001122212227. The reversal of 12001122212222 is 22221222110021.

It is a junction number, because it is equal to n+sod(n) for n = 12001122212194 and 12001122212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001122212221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 762398 + ... + 4958174.

It is an arithmetic number, because the mean of its divisors is an integer number (337422368871).

Almost surely, 2^{12001122212222} is an apocalyptic number.

12001122212222 is a deficient number, since it is larger than the sum of its proper divisors (9593909395522).

12001122212222 is a wasteful number, since it uses less digits than its factorization.

12001122212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196013.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12001122212222 its reverse (22221222110021), we get a palindrome (34222344322243).

The spelling of 12001122212222 in words is "twelve trillion, one billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-two".