22211211222212 has 6 divisors (see below), whose sum is σ = 38869619638878. Its totient is φ = 11105605611104.

The previous prime is 22211211222191. The next prime is 22211211222223. The reversal of 22211211222212 is 21222211211222.

It can be written as a sum of positive squares in only one way, i.e., 22208843815876 + 2367406336 = 4712626^2 + 48656^2 .

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

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 as a sum of consecutive naturals, namely, 2776401402773 + ... + 2776401402780.

It is an arithmetic number, because the mean of its divisors is an integer number (6478269939813).

Almost surely, 2^{22211211222212} is an apocalyptic number.

It is an amenable number.

22211211222212 is a deficient number, since it is larger than the sum of its proper divisors (16658408416666).

22211211222212 is a wasteful number, since it uses less digits than its factorization.

22211211222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552802805557 (or 5552802805555 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

Adding to 22211211222212 its reverse (21222211211222), we get a palindrome (43433422433434).

The spelling of 22211211222212 in words is "twenty-two trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twelve".