211312201111 has 16 divisors (see below), whose sum is σ = 232856638848. Its totient is φ = 190157652000.

The previous prime is 211312201057. The next prime is 211312201153. The reversal of 211312201111 is 111102213112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211312201111 - 2¹⁵ = 211312168343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211312204111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5655256 + ... + 5692498.

It is an arithmetic number, because the mean of its divisors is an integer number (14553539928).

Almost surely, 2^211312201111 is an apocalyptic number.

211312201111 is a deficient number, since it is larger than the sum of its proper divisors (21544437737).

211312201111 is a wasteful number, since it uses less digits than its factorization.

211312201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42462.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211312201111 its reverse (111102213112), we get a palindrome (322414414223).

The spelling of 211312201111 in words is "two hundred eleven billion, three hundred twelve million, two hundred one thousand, one hundred eleven".