2211222111 has 16 divisors (see below), whose sum is σ = 3370209024. Its totient is φ = 1263282624.

The previous prime is 2211222103. The next prime is 2211222137. The reversal of 2211222111 is 1112221122.

2211222111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2211222111 - 2³ = 2211222103 is a prime.

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 (2211222191) 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, 127800 + ... + 144066.

It is an arithmetic number, because the mean of its divisors is an integer number (210638064).

Almost surely, 2^2211222111 is an apocalyptic number.

2211222111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2211222111 is a deficient number, since it is larger than the sum of its proper divisors (1158986913).

2211222111 is a wasteful number, since it uses less digits than its factorization.

2211222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22750.

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

The square root of 2211222111 is about 47023.6335367653. The cubic root of 2211222111 is about 1302.7991187990.

Adding to 2211222111 its reverse (1112221122), we get a palindrome (3323443233).

The spelling of 2211222111 in words is "two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred eleven".