212021113224 has 64 divisors (see below), whose sum is σ = 543876963840. Its totient is φ = 68836170240.

The previous prime is 212021113223. The next prime is 212021113229. The reversal of 212021113224 is 422311120212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021113224.

It is not an unprimeable number, because it can be changed into a prime (212021113223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419802 + ... + 774774.

It is an arithmetic number, because the mean of its divisors is an integer number (8498077560).

Almost surely, 2^212021113224 is an apocalyptic number.

212021113224 is a gapful number since it is divisible by the number (24) 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 212021113224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271938481920).

212021113224 is an abundant number, since it is smaller than the sum of its proper divisors (331855850616).

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

212021113224 is a wasteful number, since it uses less digits than its factorization.

212021113224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355630 (or 355626 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 212021113224 its reverse (422311120212), we get a palindrome (634332233436).

The spelling of 212021113224 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, two hundred twenty-four".