2211222211 has 4 divisors (see below), whose sum is σ = 2412242424. Its totient is φ = 2010202000.

The previous prime is 2211222203. The next prime is 2211222217. The reversal of 2211222211 is 1122221122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2211222211 - 2³ = 2211222203 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2211222217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100510090 + ... + 100510111.

It is an arithmetic number, because the mean of its divisors is an integer number (603060606).

Almost surely, 2^2211222211 is an apocalyptic number.

2211222211 is a deficient number, since it is larger than the sum of its proper divisors (201020213).

2211222211 is a wasteful number, since it uses less digits than its factorization.

2211222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201020212.

The product of its digits is 64, while the sum is 16.

The square root of 2211222211 is about 47023.6346000604. The cubic root of 2211222211 is about 1302.7991384382.

Adding to 2211222211 its reverse (1122221122), we get a palindrome (3333443333).

It can be divided in two parts, 2211 and 222211, that added together give a palindrome (224422).

The spelling of 2211222211 in words is "two billion, two hundred eleven million, two hundred twenty-two thousand, two hundred eleven".