212021112312 has 192 divisors, whose sum is σ = 621731635200. Its totient is φ = 65018004480.

The previous prime is 212021112307. The next prime is 212021112343. The reversal of 212021112312 is 213211120212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57008389 + ... + 57012107.

It is an arithmetic number, because the mean of its divisors is an integer number (3238185600).

Almost surely, 2^212021112312 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 212021112312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310865817600).

212021112312 is an abundant number, since it is smaller than the sum of its proper divisors (409710522888).

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

212021112312 is a wasteful number, since it uses less digits than its factorization.

212021112312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786 (or 4779 counting only the distinct ones).

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

Adding to 212021112312 its reverse (213211120212), we get a palindrome (425232232524).

The spelling of 212021112312 in words is "two hundred twelve billion, twenty-one million, one hundred twelve thousand, three hundred twelve".