212220222220 has 96 divisors (see below), whose sum is σ = 484719943680. Its totient is φ = 77750772480.

The previous prime is 212220222217. The next prime is 212220222223. The reversal of 212220222220 is 22222022212.

212220222220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212220222217) and next prime (212220222223).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (212220222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12985174 + ... + 13001506.

It is an arithmetic number, because the mean of its divisors is an integer number (5049166080).

Almost surely, 2^212220222220 is an apocalyptic number.

212220222220 is a gapful number since it is divisible by the number (20) 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 212220222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242359971840).

212220222220 is an abundant number, since it is smaller than the sum of its proper divisors (272499721460).

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

212220222220 is a wasteful number, since it uses less digits than its factorization.

212220222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17495 (or 17493 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 212220222220 its reverse (22222022212), we get a palindrome (234442244432).

The spelling of 212220222220 in words is "two hundred twelve billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty".