212212111222 has 16 divisors (see below), whose sum is σ = 337061058192. Its totient is φ = 99859102720.

The previous prime is 212212111219. The next prime is 212212111229. The reversal of 212212111222 is 222111212212.

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 212212111222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212111229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505197 + ... + 824407.

It is an arithmetic number, because the mean of its divisors is an integer number (21066316137).

Almost surely, 2^212212111222 is an apocalyptic number.

212212111222 is a deficient number, since it is larger than the sum of its proper divisors (124848946970).

212212111222 is a wasteful number, since it uses less digits than its factorization.

212212111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338783.

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

Adding to 212212111222 its reverse (222111212212), we get a palindrome (434323323434).

The spelling of 212212111222 in words is "two hundred twelve billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-two".