212111222 has 8 divisors (see below), whose sum is σ = 322648272. Its totient is φ = 104561800.

The previous prime is 212111219. The next prime is 212111243. The reversal of 212111222 is 222111212.

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

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

It is a junction number, because it is equal to n+sod(n) for n = 212111197 and 212111206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746729 + ... + 747012.

It is an arithmetic number, because the mean of its divisors is an integer number (40331034).

Almost surely, 2^212111222 is an apocalyptic number.

212111222 is a deficient number, since it is larger than the sum of its proper divisors (110537050).

212111222 is a wasteful number, since it uses less digits than its factorization.

212111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493814.

The product of its digits is 32, while the sum is 14.

The square root of 212111222 is about 14564.0386569111. The cubic root of 212111222 is about 596.3774522258.

Adding to 212111222 its reverse (222111212), we get a palindrome (434222434).

The spelling of 212111222 in words is "two hundred twelve million, one hundred eleven thousand, two hundred twenty-two".