212116222 has 16 divisors (see below), whose sum is σ = 320349744. Its totient is φ = 105336000.

The previous prime is 212116213. The next prime is 212116231. The reversal of 212116222 is 222611212.

It is an interprime number because it is at equal distance from previous prime (212116213) and next prime (212116231).

It is a self number, because there is not a number n which added to its sum of digits gives 212116222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320572 + ... + 321232.

It is an arithmetic number, because the mean of its divisors is an integer number (20021859).

Almost surely, 2^212116222 is an apocalyptic number.

212116222 is a deficient number, since it is larger than the sum of its proper divisors (108233522).

212116222 is a wasteful number, since it uses less digits than its factorization.

212116222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515.

The product of its digits is 192, while the sum is 19.

The square root of 212116222 is about 14564.2103115823. The cubic root of 212116222 is about 596.3821382325.

Adding to 212116222 its reverse (222611212), we get a palindrome (434727434).

The spelling of 212116222 in words is "two hundred twelve million, one hundred sixteen thousand, two hundred twenty-two".