11400203123 has 4 divisors (see below), whose sum is σ = 11401132488. Its totient is φ = 11399273760.

The previous prime is 11400203083. The next prime is 11400203149. The reversal of 11400203123 is 32130200411.

11400203123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11400203123 - 2²⁶ = 11333094259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11400203153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446033 + ... + 470898.

It is an arithmetic number, because the mean of its divisors is an integer number (2850283122).

Almost surely, 2^11400203123 is an apocalyptic number.

11400203123 is a deficient number, since it is larger than the sum of its proper divisors (929365).

11400203123 is an equidigital number, since it uses as much as digits as its factorization.

11400203123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929364.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 11400203123 its reverse (32130200411), we get a palindrome (43530403534).

The spelling of 11400203123 in words is "eleven billion, four hundred million, two hundred three thousand, one hundred twenty-three".