11222111211 has 16 divisors (see below), whose sum is σ = 15402935808. Its totient is φ = 7262287200.

The previous prime is 11222111183. The next prime is 11222111273. The reversal of 11222111211 is 11211122211.

It is a happy number.

It is not a de Polignac number, because 11222111211 - 2⁷ = 11222111083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11222111291) 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, 69445 + ... + 165126.

It is an arithmetic number, because the mean of its divisors is an integer number (962683488).

Almost surely, 2^11222111211 is an apocalyptic number.

11222111211 is a deficient number, since it is larger than the sum of its proper divisors (4180824597).

11222111211 is a wasteful number, since it uses less digits than its factorization.

11222111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235042.

The product of its digits is 16, while the sum is 15.

Adding to 11222111211 its reverse (11211122211), we get a palindrome (22433233422).

It can be divided in two parts, 11 and 222111211, that added together give a palindrome (222111222).

The spelling of 11222111211 in words is "eleven billion, two hundred twenty-two million, one hundred eleven thousand, two hundred eleven".