211121230211 has 4 divisors (see below), whose sum is σ = 211375900800. Its totient is φ = 210866559624.

The previous prime is 211121230207. The next prime is 211121230213. The reversal of 211121230211 is 112032121112.

It is a happy number.

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 211121230211 - 2² = 211121230207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211121230211.

It is not an unprimeable number, because it can be changed into a prime (211121230213) 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, 127334051 + ... + 127335708.

It is an arithmetic number, because the mean of its divisors is an integer number (52843975200).

Almost surely, 2^211121230211 is an apocalyptic number.

211121230211 is a deficient number, since it is larger than the sum of its proper divisors (254670589).

211121230211 is an equidigital number, since it uses as much as digits as its factorization.

211121230211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254670588.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211121230211 its reverse (112032121112), we get a palindrome (323153351323).

The spelling of 211121230211 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred thirty thousand, two hundred eleven".