212021110422 has 72 divisors (see below), whose sum is σ = 505270525032. Its totient is φ = 64206426240.

The previous prime is 212021110421. The next prime is 212021110439. The reversal of 212021110422 is 224011120212.

212021110422 is a `hidden beast` number, since 2 + 1 + 20 + 211 + 10 + 422 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 212021110395 and 212021110404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021110421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3351093 + ... + 3413775.

It is an arithmetic number, because the mean of its divisors is an integer number (7017646181).

Almost surely, 2^212021110422 is an apocalyptic number.

212021110422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021110422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252635262516).

212021110422 is an abundant number, since it is smaller than the sum of its proper divisors (293249414610).

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

212021110422 is a wasteful number, since it uses less digits than its factorization.

212021110422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64266 (or 64252 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212021110422 its reverse (224011120212), we get a palindrome (436032230634).

The spelling of 212021110422 in words is "two hundred twelve billion, twenty-one million, one hundred ten thousand, four hundred twenty-two".