11328538663021 has 2 divisors, whose sum is σ = 11328538663022. Its totient is φ = 11328538663020.

The previous prime is 11328538662949. The next prime is 11328538663081. The reversal of 11328538663021 is 12036683582311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6652716269796 + 4675822393225 = 2579286^2 + 2162365^2 .

It is a cyclic number.

It is not a de Polignac number, because 11328538663021 - 2⁹ = 11328538662509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11328538663081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5664269331510 + 5664269331511.

It is an arithmetic number, because the mean of its divisors is an integer number (5664269331511).

Almost surely, 2^{11328538663021} is an apocalyptic number.

It is an amenable number.

11328538663021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11328538663021 is an equidigital number, since it uses as much as digits as its factorization.

11328538663021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 11328538663021 in words is "eleven trillion, three hundred twenty-eight billion, five hundred thirty-eight million, six hundred sixty-three thousand, twenty-one".