11003020021 has 12 divisors (see below), whose sum is σ = 12811036140. Its totient is φ = 9422609280.

The previous prime is 11003020013. The next prime is 11003020033. The reversal of 11003020021 is 12002030011.

It can be written as a sum of positive squares in 2 ways, for example, as 863536996 + 10139483025 = 29386^2 + 100695^2 .

It is not a de Polignac number, because 11003020021 - 2³ = 11003020013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11003020121) 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 11 ways as a sum of consecutive naturals, for example, 46900 + ... + 155581.

It is an arithmetic number, because the mean of its divisors is an integer number (1067586345).

Almost surely, 2^11003020021 is an apocalyptic number.

It is an amenable number.

11003020021 is a deficient number, since it is larger than the sum of its proper divisors (1808016119).

11003020021 is a wasteful number, since it uses less digits than its factorization.

11003020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203604 (or 203597 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 11003020021 its reverse (12002030011), we get a palindrome (23005050032).

The spelling of 11003020021 in words is "eleven billion, three million, twenty thousand, twenty-one".