211111111011 has 32 divisors (see below), whose sum is σ = 304587279360. Its totient is φ = 129711314304.

The previous prime is 211111110923. The next prime is 211111111027. The reversal of 211111111011 is 110111111112.

It is not a de Polignac number, because 211111111011 - 2¹⁴ = 211111094627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211111111061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138456 + ... + 664373.

It is an arithmetic number, because the mean of its divisors is an integer number (9518352480).

Almost surely, 2^211111111011 is an apocalyptic number.

211111111011 is a deficient number, since it is larger than the sum of its proper divisors (93476168349).

211111111011 is a wasteful number, since it uses less digits than its factorization.

211111111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802995.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 211111111011 its reverse (110111111112), we get a palindrome (321222222123).

The spelling of 211111111011 in words is "two hundred eleven billion, one hundred eleven million, one hundred eleven thousand, eleven".