212311222 has 8 divisors (see below), whose sum is σ = 321559056. Its totient is φ = 105124872.

The previous prime is 212311213. The next prime is 212311223. The reversal of 212311222 is 222113212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 212311196 and 212311205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212311223) 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, 515113 + ... + 515524.

It is an arithmetic number, because the mean of its divisors is an integer number (40194882).

Almost surely, 2^212311222 is an apocalyptic number.

212311222 is a deficient number, since it is larger than the sum of its proper divisors (109247834).

212311222 is a wasteful number, since it uses less digits than its factorization.

212311222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030742.

The product of its digits is 96, while the sum is 16.

The square root of 212311222 is about 14570.9032664417. The cubic root of 212311222 is about 596.5648350850.

Adding to 212311222 its reverse (222113212), we get a palindrome (434424434).

The spelling of 212311222 in words is "two hundred twelve million, three hundred eleven thousand, two hundred twenty-two".