212112220012 has 96 divisors (see below), whose sum is σ = 466866892800. Its totient is φ = 81914664000.

The previous prime is 212112220009. The next prime is 212112220031. The reversal of 212112220012 is 210022211212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41596239 + ... + 41601337.

It is an arithmetic number, because the mean of its divisors is an integer number (4863196800).

Almost surely, 2^212112220012 is an apocalyptic number.

212112220012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212112220012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233433446400).

212112220012 is an abundant number, since it is smaller than the sum of its proper divisors (254754672788).

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

212112220012 is a wasteful number, since it uses less digits than its factorization.

212112220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6283 (or 6281 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212112220012 its reverse (210022211212), we get a palindrome (422134431224).

The spelling of 212112220012 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty thousand, twelve".