211222211212 has 12 divisors (see below), whose sum is σ = 369644961280. Its totient is φ = 105609365136.

The previous prime is 211222211203. The next prime is 211222211219. The reversal of 211222211212 is 212112222112.

It is a super-2 number, since 2×211222211212² (a number of 23 digits) contains 22 as substring.

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 211222211212.

It is not an unprimeable number, because it can be changed into a prime (211222211219) 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, 139788 + ... + 664819.

Almost surely, 2^211222211212 is an apocalyptic number.

It is an amenable number.

211222211212 is a deficient number, since it is larger than the sum of its proper divisors (158422750068).

211222211212 is a wasteful number, since it uses less digits than its factorization.

211222211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870240 (or 870238 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

Adding to 211222211212 its reverse (212112222112), we get a palindrome (423334433324).

The spelling of 211222211212 in words is "two hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twelve".