12222212222 has 32 divisors (see below), whose sum is σ = 20109894624. Its totient is φ = 5525094400.

The previous prime is 12222212173. The next prime is 12222212263. The reversal of 12222212222 is 22221222221.

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 = 12222212194 and 12222212203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4640618 + ... + 4643250.

It is an arithmetic number, because the mean of its divisors is an integer number (628434207).

Almost surely, 2^12222212222 is an apocalyptic number.

12222212222 is a deficient number, since it is larger than the sum of its proper divisors (7887682402).

12222212222 is a wasteful number, since it uses less digits than its factorization.

12222212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724.

The product of its digits is 512, while the sum is 20.

Adding to 12222212222 its reverse (22221222221), we get a palindrome (34443434443).

Subtracting 12222212222 from its reverse (22221222221), we obtain a palindrome (9999009999).

The spelling of 12222212222 in words is "twelve billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-two".