11405403125123 has 4 divisors (see below), whose sum is σ = 13034746428720. Its totient is φ = 9776059821528.

The previous prime is 11405403125119. The next prime is 11405403125161. The reversal of 11405403125123 is 32152130450411.

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

It is not a de Polignac number, because 11405403125123 - 2² = 11405403125119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11405403125123.

It is not an unprimeable number, because it can be changed into a prime (11405403125183) 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, 814671651788 + ... + 814671651801.

It is an arithmetic number, because the mean of its divisors is an integer number (3258686607180).

Almost surely, 2^{11405403125123} is an apocalyptic number.

11405403125123 is a deficient number, since it is larger than the sum of its proper divisors (1629343303597).

11405403125123 is an equidigital number, since it uses as much as digits as its factorization.

11405403125123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629343303596.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 11405403125123 its reverse (32152130450411), we get a palindrome (43557533575534).

The spelling of 11405403125123 in words is "eleven trillion, four hundred five billion, four hundred three million, one hundred twenty-five thousand, one hundred twenty-three".