11222212211 has 12 divisors (see below), whose sum is σ = 13082390568. Its totient is φ = 9598421952.

The previous prime is 11222212207. The next prime is 11222212219. The reversal of 11222212211 is 11221222211.

It is not a de Polignac number, because 11222212211 - 2² = 11222212207 is a prime.

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 11222212211.

It is not an unprimeable number, because it can be changed into a prime (11222212219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222326 + ... + 268091.

It is an arithmetic number, because the mean of its divisors is an integer number (1090199214).

Almost surely, 2^11222212211 is an apocalyptic number.

11222212211 is a deficient number, since it is larger than the sum of its proper divisors (1860178357).

11222212211 is an equidigital number, since it uses as much as digits as its factorization.

11222212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490898 (or 490891 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 11222212211 its reverse (11221222211), we get a palindrome (22443434422).

It can be divided in two parts, 11 and 222212211, that added together give a palindrome (222212222).

The spelling of 11222212211 in words is "eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred eleven".