211212211222 has 4 divisors (see below), whose sum is σ = 316818316836. Its totient is φ = 105606105610.

The previous prime is 211212211201. The next prime is 211212211253. The reversal of 211212211222 is 222112212112.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×211212211222² (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 211212211222.

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 as a sum of consecutive naturals, namely, 52803052804 + ... + 52803052807.

It is an arithmetic number, because the mean of its divisors is an integer number (79204579209).

Almost surely, 2^211212211222 is an apocalyptic number.

211212211222 is a deficient number, since it is larger than the sum of its proper divisors (105606105614).

211212211222 is a wasteful number, since it uses less digits than its factorization.

211212211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105606105613.

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

Adding to 211212211222 its reverse (222112212112), we get a palindrome (433324423334).

The spelling of 211212211222 in words is "two hundred eleven billion, two hundred twelve million, two hundred eleven thousand, two hundred twenty-two".