212212020 has 96 divisors (see below), whose sum is σ = 646265088. Its totient is φ = 51812352.

The previous prime is 212211997. The next prime is 212212051. The reversal of 212212020 is 20212212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 212211987 and 212212005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34929 + ... + 40551.

It is an arithmetic number, because the mean of its divisors is an integer number (6731928).

Almost surely, 2^212212020 is an apocalyptic number.

212212020 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 212212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323132544).

212212020 is an abundant number, since it is smaller than the sum of its proper divisors (434053068).

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

212212020 is a wasteful number, since it uses less digits than its factorization.

212212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689 (or 5687 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 212212020 is about 14567.4987557919. The cubic root of 212212020 is about 596.4719060287.

Adding to 212212020 its reverse (20212212), we get a palindrome (232424232).

The spelling of 212212020 in words is "two hundred twelve million, two hundred twelve thousand, twenty".