11000211021521 has 2 divisors, whose sum is σ = 11000211021522. Its totient is φ = 11000211021520.

The previous prime is 11000211021509. The next prime is 11000211021539. The reversal of 11000211021521 is 12512011200011.

11000211021521 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., 10114562515600 + 885648505921 = 3180340^2 + 941089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11000211021521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11000211021521.

It is not a weakly prime, because it can be changed into another prime (11000211021721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500105510760 + 5500105510761.

It is an arithmetic number, because the mean of its divisors is an integer number (5500105510761).

Almost surely, 2^{11000211021521} is an apocalyptic number.

It is an amenable number.

11000211021521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000211021521 is an equidigital number, since it uses as much as digits as its factorization.

11000211021521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 11000211021521 its reverse (12512011200011), we get a palindrome (23512222221532).

The spelling of 11000211021521 in words is "eleven trillion, two hundred eleven million, twenty-one thousand, five hundred twenty-one".