201020102089 has 2 divisors, whose sum is σ = 201020102090. Its totient is φ = 201020102088.

The previous prime is 201020102083. The next prime is 201020102093. The reversal of 201020102089 is 980201020102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124656306489 + 76363795600 = 353067^2 + 276340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201020102089 is a prime.

It is not a weakly prime, because it can be changed into another prime (201020102083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510051044 + 100510051045.

It is an arithmetic number, because the mean of its divisors is an integer number (100510051045).

Almost surely, 2^201020102089 is an apocalyptic number.

It is an amenable number.

201020102089 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020102089 is an equidigital number, since it uses as much as digits as its factorization.

201020102089 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 201020102089 in words is "two hundred one billion, twenty million, one hundred two thousand, eighty-nine".