211021012220 has 12 divisors (see below), whose sum is σ = 443144125704.
Its totient is φ = 84408404880.
The previous prime is 211021012217. The next prime is 211021012259. The reversal of 211021012220 is 22210120112.
Adding to 211021012220 its reverse (22210120112), we get a palindrome (233231132332).
211021012220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a junction number, because it is equal to n+sod(n) for n = 211021012195 and 211021012204.
It is a congruent number.
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 3 ways as a sum of consecutive naturals, for example, 5275525286 + ... + 5275525325.
It is an arithmetic number, because the mean of its divisors is an integer number (36928677142).
Almost surely, 2211021012220 is an apocalyptic number.
211021012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
211021012220 is an abundant number, since it is smaller than the sum of its proper divisors (232123113484).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
211021012220 is a wasteful number, since it uses less digits than its factorization.
211021012220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10551050620 (or 10551050618 counting only the distinct ones).
The product of its (nonzero) digits is 32, while the sum is 14.
The spelling of 211021012220 in words is "two hundred eleven billion, twenty-one million, twelve thousand, two hundred twenty".