212011211 has 4 divisors (see below), whose sum is σ = 212043624. Its totient is φ = 211978800.

The previous prime is 212011207. The next prime is 212011223. The reversal of 212011211 is 112110212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212011211 - 2² = 212011207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011192 and 212011201.

It is not an unprimeable number, because it can be changed into a prime (212011231) 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, 2570 + ... + 20751.

It is an arithmetic number, because the mean of its divisors is an integer number (53010906).

Almost surely, 2^212011211 is an apocalyptic number.

212011211 is a deficient number, since it is larger than the sum of its proper divisors (32413).

212011211 is an equidigital number, since it uses as much as digits as its factorization.

212011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32412.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 212011211 is about 14560.6047607920. The cubic root of 212011211 is about 596.2837063105.

Adding to 212011211 its reverse (112110212), we get a palindrome (324121423).

Subtracting from 212011211 its reverse (112110212), we obtain a palindrome (99900999).

It can be divided in two parts, 2120 and 11211, that added together give a palindrome (13331).

The spelling of 212011211 in words is "two hundred twelve million, eleven thousand, two hundred eleven".