11131233111 has 20 divisors (see below), whose sum is σ = 17351103792. Its totient is φ = 7098176448.

The previous prime is 11131233103. The next prime is 11131233133. The reversal of 11131233111 is 11133213111.

11131233111 is a `hidden beast` number, since 1 + 11 + 312 + 331 + 11 = 666.

It is not a de Polignac number, because 11131233111 - 2³ = 11131233103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131233511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2985586 + ... + 2989311.

Almost surely, 2^11131233111 is an apocalyptic number.

11131233111 is a deficient number, since it is larger than the sum of its proper divisors (6219870681).

11131233111 is an equidigital number, since it uses as much as digits as its factorization.

11131233111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5974932 (or 5974923 counting only the distinct ones).

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

Adding to 11131233111 its reverse (11133213111), we get a palindrome (22264446222).

The spelling of 11131233111 in words is "eleven billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred eleven".