2122222211 has 4 divisors (see below), whose sum is σ = 2190681024. Its totient is φ = 2053763400.

The previous prime is 2122222199. The next prime is 2122222231. The reversal of 2122222211 is 1122222212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122222211 is a prime.

It is a super-2 number, since 2×2122222211² = 9007654225723457042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2122222211.

It is not an unprimeable number, because it can be changed into a prime (2122222231) 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, 34229360 + ... + 34229421.

It is an arithmetic number, because the mean of its divisors is an integer number (547670256).

Almost surely, 2^2122222211 is an apocalyptic number.

2122222211 is a deficient number, since it is larger than the sum of its proper divisors (68458813).

2122222211 is an equidigital number, since it uses as much as digits as its factorization.

2122222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68458812.

The product of its digits is 128, while the sum is 17.

The square root of 2122222211 is about 46067.5830818158. The cubic root of 2122222211 is about 1285.0803567265.

Adding to 2122222211 its reverse (1122222212), we get a palindrome (3244444423).

Subtracting from 2122222211 its reverse (1122222212), we obtain a palindrome (999999999).

The spelling of 2122222211 in words is "two billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".