11044404021 has 16 divisors (see below), whose sum is σ = 16834188800. Its totient is φ = 6309355248.

The previous prime is 11044404013. The next prime is 11044404029. The reversal of 11044404021 is 12040444011.

It is an interprime number because it is at equal distance from previous prime (11044404013) and next prime (11044404029).

It is not a de Polignac number, because 11044404021 - 2³ = 11044404013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11044404029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8190 + ... + 148848.

It is an arithmetic number, because the mean of its divisors is an integer number (1052136800).

Almost surely, 2^11044404021 is an apocalyptic number.

It is an amenable number.

11044404021 is a deficient number, since it is larger than the sum of its proper divisors (5789784779).

11044404021 is a wasteful number, since it uses less digits than its factorization.

11044404021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144408.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 11044404021 its reverse (12040444011), we get a palindrome (23084848032).

The spelling of 11044404021 in words is "eleven billion, forty-four million, four hundred four thousand, twenty-one".