212112222112 has 192 divisors, whose sum is σ = 522530217216. Its totient is φ = 82684477440.

The previous prime is 212112222107. The next prime is 212112222137. The reversal of 212112222112 is 211222211212.

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 212112222112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16699348 + ... + 16712044.

It is an arithmetic number, because the mean of its divisors is an integer number (2721511548).

Almost surely, 2^212112222112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212112222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261265108608).

212112222112 is an abundant number, since it is smaller than the sum of its proper divisors (310417995104).

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

212112222112 is a wasteful number, since it uses less digits than its factorization.

212112222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12879 (or 12871 counting only the distinct ones).

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

Adding to 212112222112 its reverse (211222211212), we get a palindrome (423334433324).

The spelling of 212112222112 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twelve".