212021220220 has 12 divisors (see below), whose sum is σ = 445244562504. Its totient is φ = 84808488080.

The previous prime is 212021220161. The next prime is 212021220227. The reversal of 212021220220 is 22022120212.

It is a junction number, because it is equal to n+sod(n) for n = 212021220194 and 212021220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021220227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300530486 + ... + 5300530525.

It is an arithmetic number, because the mean of its divisors is an integer number (37103713542).

Almost surely, 2^212021220220 is an apocalyptic number.

212021220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021220220 is an abundant number, since it is smaller than the sum of its proper divisors (233223342284).

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

212021220220 is a wasteful number, since it uses less digits than its factorization.

212021220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601061020 (or 10601061018 counting only the distinct ones).

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

Adding to 212021220220 its reverse (22022120212), we get a palindrome (234043340432).

The spelling of 212021220220 in words is "two hundred twelve billion, twenty-one million, two hundred twenty thousand, two hundred twenty".