11431403123 has 4 divisors (see below), whose sum is σ = 13064460720. Its totient is φ = 9798345528.

The previous prime is 11431403107. The next prime is 11431403129. The reversal of 11431403123 is 32130413411.

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 11431403123 - 2⁴ = 11431403107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11431403129) 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, 816528788 + ... + 816528801.

It is an arithmetic number, because the mean of its divisors is an integer number (3266115180).

Almost surely, 2^11431403123 is an apocalyptic number.

11431403123 is a deficient number, since it is larger than the sum of its proper divisors (1633057597).

11431403123 is an equidigital number, since it uses as much as digits as its factorization.

11431403123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633057596.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 11431403123 its reverse (32130413411), we get a palindrome (43561816534).

The spelling of 11431403123 in words is "eleven billion, four hundred thirty-one million, four hundred three thousand, one hundred twenty-three".