11000440021 has 4 divisors (see below), whose sum is σ = 11000731500. Its totient is φ = 11000148544.

The previous prime is 11000439997. The next prime is 11000440027. The reversal of 11000440021 is 12004400011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2812180900 + 8188259121 = 53030^2 + 90489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000440021 - 2⁷ = 11000439893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11000439983 and 11000440010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000440027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78916 + ... + 168013.

It is an arithmetic number, because the mean of its divisors is an integer number (2750182875).

Almost surely, 2^11000440021 is an apocalyptic number.

It is an amenable number.

11000440021 is a deficient number, since it is larger than the sum of its proper divisors (291479).

11000440021 is an equidigital number, since it uses as much as digits as its factorization.

11000440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291478.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 11000440021 its reverse (12004400011), we get a palindrome (23004840032).

The spelling of 11000440021 in words is "eleven billion, four hundred forty thousand, twenty-one".