11111131103 has 4 divisors (see below), whose sum is σ = 11113910808. Its totient is φ = 11108351400.

The previous prime is 11111131093. The next prime is 11111131127. The reversal of 11111131103 is 30113111111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30113111111 = 31 ⋅971390681.

It is a cyclic number.

It is not a de Polignac number, because 11111131103 - 2¹² = 11111127007 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 (11111131153) 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, 1383848 + ... + 1391853.

It is an arithmetic number, because the mean of its divisors is an integer number (2778477702).

Almost surely, 2^11111131103 is an apocalyptic number.

11111131103 is a deficient number, since it is larger than the sum of its proper divisors (2779705).

11111131103 is an equidigital number, since it uses as much as digits as its factorization.

11111131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779704.

The product of its (nonzero) digits is 9, while the sum is 14.

Adding to 11111131103 its reverse (30113111111), we get a palindrome (41224242214).

The spelling of 11111131103 in words is "eleven billion, one hundred eleven million, one hundred thirty-one thousand, one hundred three".