11421403423 has 4 divisors (see below), whose sum is σ = 11730090040. Its totient is φ = 11112716808.

The previous prime is 11421403421. The next prime is 11421403453. The reversal of 11421403423 is 32430412411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32430412411 = 20593 ⋅1574827.

It is a cyclic number.

It is not a de Polignac number, because 11421403423 - 2¹ = 11421403421 is a prime.

It is a super-3 number, since 3×11421403423³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421403421) 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, 154343253 + ... + 154343326.

It is an arithmetic number, because the mean of its divisors is an integer number (2932522510).

Almost surely, 2^11421403423 is an apocalyptic number.

11421403423 is a deficient number, since it is larger than the sum of its proper divisors (308686617).

11421403423 is an equidigital number, since it uses as much as digits as its factorization.

11421403423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308686616.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 11421403423 its reverse (32430412411), we get a palindrome (43851815834).

The spelling of 11421403423 in words is "eleven billion, four hundred twenty-one million, four hundred three thousand, four hundred twenty-three".