21020113332089 has 2 divisors, whose sum is σ = 21020113332090. Its totient is φ = 21020113332088.

The previous prime is 21020113332079. The next prime is 21020113332109. The reversal of 21020113332089 is 98023331102012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16935834010489 + 4084279321600 = 4115317^2 + 2020960^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020113332089 - 2⁴ = 21020113332073 is a prime.

It is not a weakly prime, because it can be changed into another prime (21020113332079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510056666044 + 10510056666045.

It is an arithmetic number, because the mean of its divisors is an integer number (10510056666045).

Almost surely, 2^{21020113332089} is an apocalyptic number.

It is an amenable number.

21020113332089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020113332089 is an equidigital number, since it uses as much as digits as its factorization.

21020113332089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 21020113332089 in words is "twenty-one trillion, twenty billion, one hundred thirteen million, three hundred thirty-two thousand, eighty-nine".