12222221222212 has 12 divisors (see below), whose sum is σ = 21392041424236. Its totient is φ = 6110209386720.

The previous prime is 12222221222179. The next prime is 12222221222213. The reversal of 12222221222212 is 21222212222221.

It can be written as a sum of positive squares in 2 ways, for example, as 8983603474756 + 3238617747456 = 2997266^2 + 1799616^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12222221222213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225275583 + ... + 225329830.

Almost surely, 2^{12222221222212} is an apocalyptic number.

It is an amenable number.

12222221222212 is a deficient number, since it is larger than the sum of its proper divisors (9169820202024).

12222221222212 is a wasteful number, since it uses less digits than its factorization.

12222221222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450612198 (or 450612196 counting only the distinct ones).

The product of its digits is 2048, while the sum is 25.

Adding to 12222221222212 its reverse (21222212222221), we get a palindrome (33444433444433).

The spelling of 12222221222212 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".