11131103123 has 4 divisors (see below), whose sum is σ = 12721260720. Its totient is φ = 9540945528.

The previous prime is 11131103117. The next prime is 11131103131. The reversal of 11131103123 is 32130113111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11131103123 - 2⁶ = 11131103059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11131103153) 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, 795078788 + ... + 795078801.

It is an arithmetic number, because the mean of its divisors is an integer number (3180315180).

Almost surely, 2^11131103123 is an apocalyptic number.

11131103123 is a deficient number, since it is larger than the sum of its proper divisors (1590157597).

11131103123 is an equidigital number, since it uses as much as digits as its factorization.

11131103123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590157596.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11131103123 its reverse (32130113111), we get a palindrome (43261216234).

The spelling of 11131103123 in words is "eleven billion, one hundred thirty-one million, one hundred three thousand, one hundred twenty-three".