2221111211 has 12 divisors (see below), whose sum is σ = 2450498400. Its totient is φ = 2011656240.

The previous prime is 2221111201. The next prime is 2221111241. The reversal of 2221111211 is 1121111222.

It is not a de Polignac number, because 2221111211 - 2²² = 2216916907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221111201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1571 + ... + 66668.

It is an arithmetic number, because the mean of its divisors is an integer number (204208200).

Almost surely, 2^2221111211 is an apocalyptic number.

2221111211 is a deficient number, since it is larger than the sum of its proper divisors (229387189).

2221111211 is a wasteful number, since it uses less digits than its factorization.

2221111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68530 (or 68519 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 2221111211 is about 47128.6665523225. Note that the first 3 decimals coincide. The cubic root of 2221111211 is about 1304.7383710432.

Adding to 2221111211 its reverse (1121111222), we get a palindrome (3342222433).

It can be divided in two parts, 222111 and 1211, that added together give a palindrome (223322).

The spelling of 2221111211 in words is "two billion, two hundred twenty-one million, one hundred eleven thousand, two hundred eleven".