11344040021 has 4 divisors (see below), whose sum is σ = 11350846752. Its totient is φ = 11337233292.

The previous prime is 11344039979. The next prime is 11344040027. The reversal of 11344040021 is 12004044311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11344040021 - 2⁶ = 11344039957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11344039975 and 11344040002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11344040027) 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, 3400865 + ... + 3404198.

It is an arithmetic number, because the mean of its divisors is an integer number (2837711688).

Almost surely, 2^11344040021 is an apocalyptic number.

It is an amenable number.

11344040021 is a deficient number, since it is larger than the sum of its proper divisors (6806731).

11344040021 is an equidigital number, since it uses as much as digits as its factorization.

11344040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806730.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11344040021 its reverse (12004044311), we get a palindrome (23348084332).

The spelling of 11344040021 in words is "eleven billion, three hundred forty-four million, forty thousand, twenty-one".