11103112031 has 4 divisors (see below), whose sum is σ = 12112485864. Its totient is φ = 10093738200.

The previous prime is 11103112021. The next prime is 11103112039. The reversal of 11103112031 is 13021130111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13021130111 = 11 ⋅1183739101.

It is a cyclic number.

It is not a de Polignac number, because 11103112031 - 2¹⁸ = 11102849887 is a prime.

It is a super-2 number, since 2×11103112031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11103111997 and 11103112015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11103112039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504686900 + ... + 504686921.

It is an arithmetic number, because the mean of its divisors is an integer number (3028121466).

Almost surely, 2^11103112031 is an apocalyptic number.

11103112031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11103112031 is a deficient number, since it is larger than the sum of its proper divisors (1009373833).

11103112031 is a wasteful number, since it uses less digits than its factorization.

11103112031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009373832.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11103112031 its reverse (13021130111), we get a palindrome (24124242142).

The spelling of 11103112031 in words is "eleven billion, one hundred three million, one hundred twelve thousand, thirty-one".