22221212212 has 12 divisors (see below), whose sum is σ = 38910516736. Its totient is φ = 11103921720.

The previous prime is 22221212201. The next prime is 22221212231. The reversal of 22221212212 is 21221212222.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22221212212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663614 + ... + 1676917.

Almost surely, 2^22221212212 is an apocalyptic number.

It is an amenable number.

22221212212 is a deficient number, since it is larger than the sum of its proper divisors (16689304524).

22221212212 is a wasteful number, since it uses less digits than its factorization.

22221212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342198 (or 3342196 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

Adding to 22221212212 its reverse (21221212222), we get a palindrome (43442424434).

The spelling of 22221212212 in words is "twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twelve".