11123331111 has 6 divisors (see below), whose sum is σ = 16067033840. Its totient is φ = 7415554068.

The previous prime is 11123331103. The next prime is 11123331133. The reversal of 11123331111 is 11113332111.

11123331111 is a `hidden beast` number, since 111 + 233 + 311 + 11 = 666.

It is not a de Polignac number, because 11123331111 - 2³ = 11123331103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123331211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617962831 + ... + 617962848.

Almost surely, 2^11123331111 is an apocalyptic number.

11123331111 is a deficient number, since it is larger than the sum of its proper divisors (4943702729).

11123331111 is a wasteful number, since it uses less digits than its factorization.

11123331111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235925685 (or 1235925682 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11123331111 its reverse (11113332111), we get a palindrome (22236663222).

The spelling of 11123331111 in words is "eleven billion, one hundred twenty-three million, three hundred thirty-one thousand, one hundred eleven".