11222222111 has 8 divisors (see below), whose sum is σ = 11813894400. Its totient is φ = 10630652760.

The previous prime is 11222222083. The next prime is 11222222113. The reversal of 11222222111 is 11122222211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11222222111 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11222222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222222113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311450 + ... + 345608.

It is an arithmetic number, because the mean of its divisors is an integer number (1476736800).

Almost surely, 2^11222222111 is an apocalyptic number.

11222222111 is a deficient number, since it is larger than the sum of its proper divisors (591672289).

11222222111 is a wasteful number, since it uses less digits than its factorization.

11222222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51469.

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

Adding to 11222222111 its reverse (11122222211), we get a palindrome (22344444322).

The spelling of 11222222111 in words is "eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred eleven".