2011111211 has 6 divisors (see below), whose sum is σ = 2014702236. Its totient is φ = 2007526500.

The previous prime is 2011111181. The next prime is 2011111231. The reversal of 2011111211 is 1121111102.

It is not a de Polignac number, because 2011111211 - 2¹⁰ = 2011110187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111192 and 2011111201.

It is not an unprimeable number, because it can be changed into a prime (2011111231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 395636 + ... + 400686.

It is an arithmetic number, because the mean of its divisors is an integer number (335783706).

Almost surely, 2^2011111211 is an apocalyptic number.

2011111211 is a deficient number, since it is larger than the sum of its proper divisors (3591025).

2011111211 is an frugal number, since it uses more digits than its factorization.

2011111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313 (or 5682 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 2011111211 is about 44845.4146039481. The cubic root of 2011111211 is about 1262.2499504918.

Adding to 2011111211 its reverse (1121111102), we get a palindrome (3132222313).

The spelling of 2011111211 in words is "two billion, eleven million, one hundred eleven thousand, two hundred eleven".