2211111111 has 32 divisors (see below), whose sum is σ = 3391084800. Its totient is φ = 1267418880.

The previous prime is 2211111101. The next prime is 2211111143. The reversal of 2211111111 is 1111111122.

It is not a de Polignac number, because 2211111111 - 2⁵ = 2211111079 is a prime.

2211111111 is a modest number, since divided by 111111 gives 2211 as remainder.

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 (2211111101) 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, 421875 + ... + 427083.

It is an arithmetic number, because the mean of its divisors is an integer number (105971400).

Almost surely, 2^2211111111 is an apocalyptic number.

2211111111 is a deficient number, since it is larger than the sum of its proper divisors (1179973689).

2211111111 is a wasteful number, since it uses less digits than its factorization.

2211111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919.

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

The square root of 2211111111 is about 47022.4532643715. The cubic root of 2211111111 is about 1302.7773189202. Note that the first 3 decimals are identical.

Adding to 2211111111 its reverse (1111111122), we get a palindrome (3322222233).

It can be divided in two parts, 22111111 and 11, that added together give a palindrome (22111122).

The spelling of 2211111111 in words is "two billion, two hundred eleven million, one hundred eleven thousand, one hundred eleven".