212021122220 has 24 divisors (see below), whose sum is σ = 460597611600. Its totient is φ = 81884019392.

The previous prime is 212021122177. The next prime is 212021122259. The reversal of 212021122220 is 22221120212.

It is a happy number.

212021122220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 182776250 + ... + 182777409.

It is an arithmetic number, because the mean of its divisors is an integer number (19191567150).

Almost surely, 2^212021122220 is an apocalyptic number.

212021122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021122220 is an abundant number, since it is smaller than the sum of its proper divisors (248576489380).

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

212021122220 is a wasteful number, since it uses less digits than its factorization.

212021122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365553697 (or 365553695 counting only the distinct ones).

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

Adding to 212021122220 its reverse (22221120212), we get a palindrome (234242242432).

The spelling of 212021122220 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty".