11040123403 has 4 divisors (see below), whose sum is σ = 11396256448. Its totient is φ = 10683990360.

The previous prime is 11040123383. The next prime is 11040123433. The reversal of 11040123403 is 30432104011.

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 11040123403 - 2¹⁷ = 11039992331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11040123433) 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, 178066476 + ... + 178066537.

It is an arithmetic number, because the mean of its divisors is an integer number (2849064112).

Almost surely, 2^11040123403 is an apocalyptic number.

11040123403 is a deficient number, since it is larger than the sum of its proper divisors (356133045).

11040123403 is an equidigital number, since it uses as much as digits as its factorization.

11040123403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356133044.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 11040123403 its reverse (30432104011), we get a palindrome (41472227414).

The spelling of 11040123403 in words is "eleven billion, forty million, one hundred twenty-three thousand, four hundred three".