11440421243 has 4 divisors (see below), whose sum is σ = 11482950960. Its totient is φ = 11397891528.

The previous prime is 11440421177. The next prime is 11440421249. The reversal of 11440421243 is 34212404411.

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 11440421243 - 2¹⁰ = 11440420219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11440421249) 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, 21264455 + ... + 21264992.

It is an arithmetic number, because the mean of its divisors is an integer number (2870737740).

Almost surely, 2^11440421243 is an apocalyptic number.

11440421243 is a deficient number, since it is larger than the sum of its proper divisors (42529717).

11440421243 is an equidigital number, since it uses as much as digits as its factorization.

11440421243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42529716.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 11440421243 its reverse (34212404411), we get a palindrome (45652825654).

The spelling of 11440421243 in words is "eleven billion, four hundred forty million, four hundred twenty-one thousand, two hundred forty-three".