212031112212 has 120 divisors (see below), whose sum is σ = 561301309800. Its totient is φ = 69787920384.

The previous prime is 212031112211. The next prime is 212031112247. The reversal of 212031112212 is 212211130212.

212031112212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 29228689296 + 182802422916 = 170964^2 + 427554^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212031112211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9837864 + ... + 9859392.

It is an arithmetic number, because the mean of its divisors is an integer number (4677510915).

Almost surely, 2^212031112212 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 212031112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280650654900).

212031112212 is an abundant number, since it is smaller than the sum of its proper divisors (349270197588).

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

212031112212 is a wasteful number, since it uses less digits than its factorization.

212031112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21927 (or 21916 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212031112212 its reverse (212211130212), we get a palindrome (424242242424).

The spelling of 212031112212 in words is "two hundred twelve billion, thirty-one million, one hundred twelve thousand, two hundred twelve".