212211 has 24 divisors (see below), whose sum is σ = 346320. Its totient is φ = 124416.

The previous prime is 212209. The next prime is 212227. The reversal of 212211 is 112212.

212211 is nontrivially palindromic in base 2 and base 4.

It is not a de Polignac number, because 212211 - 2¹ = 212209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

212211 is an undulating number in base 8.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 212193 and 212202.

It is not an unprimeable number, because it can be changed into a prime (212281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2871 + ... + 2943.

It is an arithmetic number, because the mean of its divisors is an integer number (14430).

2²¹²²¹¹ is an apocalyptic number.

212211 is a deficient number, since it is larger than the sum of its proper divisors (134109).

212211 is a wasteful number, since it uses less digits than its factorization.

212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 112 counting only the distinct ones).

The product of its digits is 8, while the sum is 9.

The square root of 212211 is about 460.6636517026. The cubic root of 212211 is about 59.6470950377.

Adding to 212211 its reverse (112212), we get a palindrome (324423).

Subtracting from 212211 its reverse (112212), we obtain a palindrome (99999).

The spelling of 212211 in words is "two hundred twelve thousand, two hundred eleven", and thus it is an iban number.