212031222312 has 256 divisors, whose sum is σ = 671662172160. Its totient is φ = 54276977664.

The previous prime is 212031222289. The next prime is 212031222343. The reversal of 212031222312 is 213222130212.

212031222312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35794983 + ... + 35800905.

It is an arithmetic number, because the mean of its divisors is an integer number (2623680360).

Almost surely, 2^212031222312 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 212031222312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335831086080).

212031222312 is an abundant number, since it is smaller than the sum of its proper divisors (459630949848).

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

212031222312 is a wasteful number, since it uses less digits than its factorization.

212031222312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432 (or 6428 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212031222312 its reverse (213222130212), we get a palindrome (425253352524).

The spelling of 212031222312 in words is "two hundred twelve billion, thirty-one million, two hundred twenty-two thousand, three hundred twelve".