211021110211 has 16 divisors (see below), whose sum is σ = 226872273600. Its totient is φ = 195572551680.

The previous prime is 211021110187. The next prime is 211021110221. The reversal of 211021110211 is 112011120112.

It is a happy number.

211021110211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211021110211 - 2¹¹ = 211021108163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211021110191 and 211021110200.

It is not an unprimeable number, because it can be changed into a prime (211021110221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6621 + ... + 649681.

It is an arithmetic number, because the mean of its divisors is an integer number (14179517100).

Almost surely, 2^211021110211 is an apocalyptic number.

211021110211 is a deficient number, since it is larger than the sum of its proper divisors (15851163389).

211021110211 is a wasteful number, since it uses less digits than its factorization.

211021110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643374.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211021110211 its reverse (112011120112), we get a palindrome (323032230323).

Subtracting from 211021110211 its reverse (112011120112), we obtain a palindrome (99009990099).

The spelling of 211021110211 in words is "two hundred eleven billion, twenty-one million, one hundred ten thousand, two hundred eleven".