212101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
212101 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
It is a congruent number.
2212101 is an apocalyptic number.
It is an amenable number.
212101 is a wasteful number, since it uses less digits than its factorization.
212101 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1990.
The square root of 212101 is about 460.5442432601. The cubic root of 212101 is about 59.6367871925.
Adding to 212101 its reverse (101212), we get a palindrome (313313).
Subtracting from 212101 its reverse (101212), we obtain a square (110889 = 3332).
The spelling of 212101 in words is "two hundred twelve thousand, one hundred one", and thus it is an iban number.