11001100021 has 2 divisors, whose sum is σ = 11001100022. Its totient is φ = 11001100020.

The previous prime is 11001100013. The next prime is 11001100037. The reversal of 11001100021 is 12000110011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8819275921 + 2181824100 = 93911^2 + 46710^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001100021 - 2³ = 11001100013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11001099977 and 11001100013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001100081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500550010 + 5500550011.

It is an arithmetic number, because the mean of its divisors is an integer number (5500550011).

Almost surely, 2^11001100021 is an apocalyptic number.

It is an amenable number.

11001100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001100021 is an equidigital number, since it uses as much as digits as its factorization.

11001100021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 11001100021 its reverse (12000110011), we get a palindrome (23001210032).

The spelling of 11001100021 in words is "eleven billion, one million, one hundred thousand, twenty-one".