21000202002089 has 2 divisors, whose sum is σ = 21000202002090. Its totient is φ = 21000202002088.

The previous prime is 21000202002083. The next prime is 21000202002127. The reversal of 21000202002089 is 98020020200012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17419629784489 + 3580572217600 = 4173683^2 + 1892240^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000202002089 - 2⁸ = 21000202001833 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000202002083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500101001044 + 10500101001045.

It is an arithmetic number, because the mean of its divisors is an integer number (10500101001045).

Almost surely, 2^{21000202002089} is an apocalyptic number.

It is an amenable number.

21000202002089 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000202002089 is an equidigital number, since it uses as much as digits as its factorization.

21000202002089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 21000202002089 in words is "twenty-one trillion, two hundred two million, two thousand, eighty-nine".