11003021 has 2 divisors, whose sum is σ = 11003022. Its totient is φ = 11003020.

The previous prime is 11003011. The next prime is 11003059. The reversal of 11003021 is 12030011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5827396 + 5175625 = 2414^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 11003021 - 2¹⁴ = 10986637 is a prime.

It is a super-2 number, since 2×11003021² = 242132942252882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11003011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5501510 + 5501511.

It is an arithmetic number, because the mean of its divisors is an integer number (5501511).

Almost surely, 2^11003021 is an apocalyptic number.

It is an amenable number.

11003021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11003021 is an equidigital number, since it uses as much as digits as its factorization.

11003021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 11003021 is about 3317.0801919761. The cubic root of 11003021 is about 222.4183667202.

Adding to 11003021 its reverse (12030011), we get a palindrome (23033032).

The spelling of 11003021 in words is "eleven million, three thousand, twenty-one".