212210112222 has 32 divisors (see below), whose sum is σ = 471681968160. Its totient is φ = 70721112960.

The previous prime is 212210112197. The next prime is 212210112229. The reversal of 212210112222 is 222211012212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212210112195 and 212210112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210112229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184513 + ... + 677100.

It is an arithmetic number, because the mean of its divisors is an integer number (14740061505).

Almost surely, 2^212210112222 is an apocalyptic number.

212210112222 is an abundant number, since it is smaller than the sum of its proper divisors (259471855938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212210112222 is a wasteful number, since it uses less digits than its factorization.

212210112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866185 (or 866179 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212210112222 its reverse (222211012212), we get a palindrome (434421124434).

The spelling of 212210112222 in words is "two hundred twelve billion, two hundred ten million, one hundred twelve thousand, two hundred twenty-two".