11001000221021 has 2 divisors, whose sum is σ = 11001000221022. Its totient is φ = 11001000221020.

The previous prime is 11001000220993. The next prime is 11001000221039. The reversal of 11001000221021 is 12012200010011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10995783048121 + 5217172900 = 3315989^2 + 72230^2 .

It is an emirp because it is prime and its reverse (12012200010011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11001000221021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11001000220993 and 11001000221011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001000223021) 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, 5500500110510 + 5500500110511.

It is an arithmetic number, because the mean of its divisors is an integer number (5500500110511).

Almost surely, 2^{11001000221021} is an apocalyptic number.

It is an amenable number.

11001000221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001000221021 is an equidigital number, since it uses as much as digits as its factorization.

11001000221021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11001000221021 its reverse (12012200010011), we get a palindrome (23013200231032).

The spelling of 11001000221021 in words is "eleven trillion, one billion, two hundred twenty-one thousand, twenty-one".