211222222 has 8 divisors (see below), whose sum is σ = 316935216. Its totient is φ = 105577152.

The previous prime is 211222217. The next prime is 211222223. The reversal of 211222222 is 222222112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211222222² = 89229654133234568, which contains 22 as substring.

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

211222222 is a modest number, since divided by 22222 gives 2112 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 211222196 and 211222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222223) 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, 8323 + ... + 22174.

It is an arithmetic number, because the mean of its divisors is an integer number (39616902).

Almost surely, 2^211222222 is an apocalyptic number.

211222222 is a deficient number, since it is larger than the sum of its proper divisors (105712994).

211222222 is a wasteful number, since it uses less digits than its factorization.

211222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33962.

The product of its digits is 128, while the sum is 16.

The square root of 211222222 is about 14533.4862300826. The cubic root of 211222222 is about 595.5431069623.

Adding to 211222222 its reverse (222222112), we get a palindrome (433444334).

The spelling of 211222222 in words is "two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".