1103111131 has 4 divisors (see below), whose sum is σ = 1103177664. Its totient is φ = 1103044600.

The previous prime is 1103111117. The next prime is 1103111137. The reversal of 1103111131 is 1311113011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1311113011 = 13 ⋅100854847.

It is a cyclic number.

It is not a de Polignac number, because 1103111131 - 2⁷ = 1103111003 is a prime.

It is a super-2 number, since 2×1103111131² = 2433708334672198322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103111137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13821 + ... + 48961.

It is an arithmetic number, because the mean of its divisors is an integer number (275794416).

Almost surely, 2^1103111131 is an apocalyptic number.

1103111131 is a deficient number, since it is larger than the sum of its proper divisors (66533).

1103111131 is an equidigital number, since it uses as much as digits as its factorization.

1103111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66532.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1103111131 is about 33213.1168516296. The cubic root of 1103111131 is about 1033.2523989912.

Adding to 1103111131 its reverse (1311113011), we get a palindrome (2414224142).

The spelling of 1103111131 in words is "one billion, one hundred three million, one hundred eleven thousand, one hundred thirty-one".