11004542821 has 4 divisors (see below), whose sum is σ = 11010066412. Its totient is φ = 10999019232.

The previous prime is 11004542777. The next prime is 11004542839. The reversal of 11004542821 is 12824540011.

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 8653650625 + 2350892196 = 93025^2 + 48486^2 .

It is a cyclic number.

It is not a de Polignac number, because 11004542821 - 2¹¹ = 11004540773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11004542821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11004512821) 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, 2758806 + ... + 2762791.

It is an arithmetic number, because the mean of its divisors is an integer number (2752516603).

Almost surely, 2^11004542821 is an apocalyptic number.

It is an amenable number.

11004542821 is a deficient number, since it is larger than the sum of its proper divisors (5523591).

11004542821 is an equidigital number, since it uses as much as digits as its factorization.

11004542821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5523590.

The product of its (nonzero) digits is 2560, while the sum is 28.

The spelling of 11004542821 in words is "eleven billion, four million, five hundred forty-two thousand, eight hundred twenty-one".