2222211111 has 32 divisors (see below), whose sum is σ = 3072599040. Its totient is φ = 1427673600.

The previous prime is 2222211001. The next prime is 2222211149. The reversal of 2222211111 is 1111122222.

2222211111 is a nontrivial binomial coefficient, being equal to C(66667, 2).

It is not a de Polignac number, because 2222211111 - 2¹⁰ = 2222210087 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222211611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5433075 + ... + 5433483.

It is an arithmetic number, because the mean of its divisors is an integer number (96018720).

Almost surely, 2^2222211111 is an apocalyptic number.

2222211111 is the 66666-th triangular number.

2222211111 is a deficient number, since it is larger than the sum of its proper divisors (850387929).

2222211111 is a wasteful number, since it uses less digits than its factorization.

2222211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its digits is 32, while the sum is 15.

The square root of 2222211111 is about 47140.3342266471. The cubic root of 2222211111 is about 1304.9537054378.

Adding to 2222211111 its reverse (1111122222), we get a palindrome (3333333333).

Subtracting from 2222211111 its reverse (1111122222), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 22222 and 11111, that added together give a palindrome (33333).

The spelling of 2222211111 in words is "two billion, two hundred twenty-two million, two hundred eleven thousand, one hundred eleven".