212021100220 has 12 divisors (see below), whose sum is σ = 445244310504. Its totient is φ = 84808440080.

The previous prime is 212021100173. The next prime is 212021100253. The reversal of 212021100220 is 22001120212.

It is a happy number.

212021100220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 212021100220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300527486 + ... + 5300527525.

It is an arithmetic number, because the mean of its divisors is an integer number (37103692542).

Almost surely, 2^212021100220 is an apocalyptic number.

212021100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021100220 is an abundant number, since it is smaller than the sum of its proper divisors (233223210284).

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

212021100220 is a wasteful number, since it uses less digits than its factorization.

212021100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601055020 (or 10601055018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212021100220 its reverse (22001120212), we get a palindrome (234022220432).

The spelling of 212021100220 in words is "two hundred twelve billion, twenty-one million, one hundred thousand, two hundred twenty".