212243040312 has 128 divisors (see below), whose sum is σ = 560725804800. Its totient is φ = 66852466688.

The previous prime is 212243040299. The next prime is 212243040313. The reversal of 212243040312 is 213040342212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212243040313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6164008 + ... + 6198344.

It is an arithmetic number, because the mean of its divisors is an integer number (4380670350).

Almost surely, 2^212243040312 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 212243040312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280362902400).

212243040312 is an abundant number, since it is smaller than the sum of its proper divisors (348482764488).

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

212243040312 is a wasteful number, since it uses less digits than its factorization.

212243040312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34565 (or 34561 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 212243040312 its reverse (213040342212), we get a palindrome (425283382524).

The spelling of 212243040312 in words is "two hundred twelve billion, two hundred forty-three million, forty thousand, three hundred twelve".