11011330021 has 2 divisors, whose sum is σ = 11011330022. Its totient is φ = 11011330020.

The previous prime is 11011330019. The next prime is 11011330079. The reversal of 11011330021 is 12003311011.

11011330021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9061136100 + 1950193921 = 95190^2 + 44161^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011330021 - 2¹ = 11011330019 is a prime.

Together with 11011330019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11011329983 and 11011330010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011330921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505665010 + 5505665011.

It is an arithmetic number, because the mean of its divisors is an integer number (5505665011).

Almost surely, 2^11011330021 is an apocalyptic number.

It is an amenable number.

11011330021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011330021 is an equidigital number, since it uses as much as digits as its factorization.

11011330021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 11011330021 its reverse (12003311011), we get a palindrome (23014641032).

The spelling of 11011330021 in words is "eleven billion, eleven million, three hundred thirty thousand, twenty-one".