2111111211 has 16 divisors (see below), whose sum is σ = 3128647680. Its totient is φ = 1255319520.

The previous prime is 2111111209. The next prime is 2111111213. The reversal of 2111111211 is 1121111112.

It is an interprime number because it is at equal distance from previous prime (2111111209) and next prime (2111111213).

It is not a de Polignac number, because 2111111211 - 2¹ = 2111111209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111111213) 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, 601771 + ... + 605268.

It is an arithmetic number, because the mean of its divisors is an integer number (195540480).

Almost surely, 2^2111111211 is an apocalyptic number.

2111111211 is a deficient number, since it is larger than the sum of its proper divisors (1017536469).

2111111211 is a wasteful number, since it uses less digits than its factorization.

2111111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207106.

The product of its digits is 4, while the sum is 12.

The square root of 2111111211 is about 45946.8302606393. The cubic root of 2111111211 is about 1282.8337306584.

Adding to 2111111211 its reverse (1121111112), we get a palindrome (3232222323).

Subtracting from 2111111211 its reverse (1121111112), we obtain a palindrome (990000099).

It can be divided in two parts, 21111112 and 11, that multiplied together give a palindrome (232222232).

The spelling of 2111111211 in words is "two billion, one hundred eleven million, one hundred eleven thousand, two hundred eleven".