21020200001089 has 2 divisors, whose sum is σ = 21020200001090. Its totient is φ = 21020200001088.

The previous prime is 21020200001063. The next prime is 21020200001167. The reversal of 21020200001089 is 98010000202012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13540986916864 + 7479213084225 = 3679808^2 + 2734815^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020200001089 - 2²³ = 21020191612481 is a prime.

It is not a weakly prime, because it can be changed into another prime (21020200001029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510100000544 + 10510100000545.

It is an arithmetic number, because the mean of its divisors is an integer number (10510100000545).

Almost surely, 2^{21020200001089} is an apocalyptic number.

It is an amenable number.

21020200001089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020200001089 is an equidigital number, since it uses as much as digits as its factorization.

21020200001089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 21020200001089 in words is "twenty-one trillion, twenty billion, two hundred million, one thousand, eighty-nine".