212022210220 has 72 divisors (see below), whose sum is σ = 458380717200. Its totient is φ = 82376071680.

The previous prime is 212022210217. The next prime is 212022210269. The reversal of 212022210220 is 22012220212.

It is a junction number, because it is equal to n+sod(n) for n = 212022210194 and 212022210203.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7685211 + ... + 7712749.

It is an arithmetic number, because the mean of its divisors is an integer number (6366398850).

Almost surely, 2^212022210220 is an apocalyptic number.

212022210220 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 212022210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229190358600).

212022210220 is an abundant number, since it is smaller than the sum of its proper divisors (246358506980).

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

212022210220 is a wasteful number, since it uses less digits than its factorization.

212022210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27859 (or 27816 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 212022210220 its reverse (22012220212), we get a palindrome (234034430432).

The spelling of 212022210220 in words is "two hundred twelve billion, twenty-two million, two hundred ten thousand, two hundred twenty".