11421040123 has 4 divisors (see below), whose sum is σ = 11447539488. Its totient is φ = 11394540760.

The previous prime is 11421040117. The next prime is 11421040171. The reversal of 11421040123 is 32104012411.

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 11421040123 - 2¹³ = 11421031931 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 11421040123.

It is not an unprimeable number, because it can be changed into a prime (11421041123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13249036 + ... + 13249897.

It is an arithmetic number, because the mean of its divisors is an integer number (2861884872).

Almost surely, 2^11421040123 is an apocalyptic number.

11421040123 is a deficient number, since it is larger than the sum of its proper divisors (26499365).

11421040123 is an equidigital number, since it uses as much as digits as its factorization.

11421040123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26499364.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11421040123 its reverse (32104012411), we get a palindrome (43525052534).

The spelling of 11421040123 in words is "eleven billion, four hundred twenty-one million, forty thousand, one hundred twenty-three".