11222220211 has 4 divisors (see below), whose sum is σ = 11812863400. Its totient is φ = 10631577024.

The previous prime is 11222220209. The next prime is 11222220223. The reversal of 11222220211 is 11202222211.

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 11222220211 - 2¹ = 11222220209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11222220511) 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, 295321566 + ... + 295321603.

It is an arithmetic number, because the mean of its divisors is an integer number (2953215850).

Almost surely, 2^11222220211 is an apocalyptic number.

11222220211 is a deficient number, since it is larger than the sum of its proper divisors (590643189).

11222220211 is an equidigital number, since it uses as much as digits as its factorization.

11222220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590643188.

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

Adding to 11222220211 its reverse (11202222211), we get a palindrome (22424442422).

The spelling of 11222220211 in words is "eleven billion, two hundred twenty-two million, two hundred twenty thousand, two hundred eleven".