11222112111 has 32 divisors (see below), whose sum is σ = 17417932800. Its totient is φ = 6293998080.

The previous prime is 11222112071. The next prime is 11222112157. The reversal of 11222112111 is 11121122211.

It is a happy number.

It is not a de Polignac number, because 11222112111 - 2¹⁴ = 11222095727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222112191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 604455 + ... + 622743.

It is an arithmetic number, because the mean of its divisors is an integer number (544310400).

Almost surely, 2^11222112111 is an apocalyptic number.

11222112111 is a deficient number, since it is larger than the sum of its proper divisors (6195820689).

11222112111 is a wasteful number, since it uses less digits than its factorization.

11222112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18839.

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

Adding to 11222112111 its reverse (11121122211), we get a palindrome (22343234322).

The spelling of 11222112111 in words is "eleven billion, two hundred twenty-two million, one hundred twelve thousand, one hundred eleven".