212012122220 has 24 divisors (see below), whose sum is σ = 445281913104. Its totient is φ = 84794095296.

The previous prime is 212012122207. The next prime is 212012122229. The reversal of 212012122220 is 22221210212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (212012122229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509474 + ... + 826793.

It is an arithmetic number, because the mean of its divisors is an integer number (18553413046).

Almost surely, 2^212012122220 is an apocalyptic number.

212012122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212012122220 is an abundant number, since it is smaller than the sum of its proper divisors (233269790884).

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

212012122220 is a wasteful number, since it uses less digits than its factorization.

212012122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344209 (or 1344207 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212012122220 its reverse (22221210212), we get a palindrome (234233332432).

The spelling of 212012122220 in words is "two hundred twelve billion, twelve million, one hundred twenty-two thousand, two hundred twenty".