11133344021 has 2 divisors, whose sum is σ = 11133344022. Its totient is φ = 11133344020.

The previous prime is 11133344009. The next prime is 11133344023. The reversal of 11133344021 is 12044333111.

11133344021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8837880100 + 2295463921 = 94010^2 + 47911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11133344021 is a prime.

Together with 11133344023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11133344023) 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, 5566672010 + 5566672011.

It is an arithmetic number, because the mean of its divisors is an integer number (5566672011).

Almost surely, 2^11133344021 is an apocalyptic number.

It is an amenable number.

11133344021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11133344021 is an equidigital number, since it uses as much as digits as its factorization.

11133344021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 11133344021 its reverse (12044333111), we get a palindrome (23177677132).

The spelling of 11133344021 in words is "eleven billion, one hundred thirty-three million, three hundred forty-four thousand, twenty-one".