11111231103 has 32 divisors (see below), whose sum is σ = 17893693440. Its totient is φ = 5991084000.

The previous prime is 11111231083. The next prime is 11111231107. The reversal of 11111231103 is 30113211111.

It is not a de Polignac number, because 11111231103 - 2⁶ = 11111231039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111231107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44676 + ... + 155622.

It is an arithmetic number, because the mean of its divisors is an integer number (559177920).

Almost surely, 2^11111231103 is an apocalyptic number.

11111231103 is a deficient number, since it is larger than the sum of its proper divisors (6782462337).

11111231103 is a wasteful number, since it uses less digits than its factorization.

11111231103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111227.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 11111231103 its reverse (30113211111), we get a palindrome (41224442214).

The spelling of 11111231103 in words is "eleven billion, one hundred eleven million, two hundred thirty-one thousand, one hundred three".