222211212221212 has 24 divisors (see below), whose sum is σ = 399824188247232. Its totient is φ = 107995729075200.

The previous prime is 222211212221137. The next prime is 222211212221227. The reversal of 222211212221212 is 212122212112222.

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

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2499856693 + ... + 2499945580.

It is an arithmetic number, because the mean of its divisors is an integer number (16659341176968).

Almost surely, 2^{222211212221212} is an apocalyptic number.

It is an amenable number.

222211212221212 is a deficient number, since it is larger than the sum of its proper divisors (177612976026020).

222211212221212 is a wasteful number, since it uses less digits than its factorization.

222211212221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999802589 (or 4999802587 counting only the distinct ones).

The product of its digits is 1024, while the sum is 25.

Adding to 222211212221212 its reverse (212122212112222), we get a palindrome (434333424333434).

The spelling of 222211212221212 in words is "two hundred twenty-two trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".