201020120002189 has 2 divisors, whose sum is σ = 201020120002190. Its totient is φ = 201020120002188.

The previous prime is 201020120002187. The next prime is 201020120002241. The reversal of 201020120002189 is 981200021020102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200989313784900 + 30806217289 = 14177070^2 + 175517^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020120002189 - 2¹ = 201020120002187 is a prime.

Together with 201020120002187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020120002181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510060001094 + 100510060001095.

It is an arithmetic number, because the mean of its divisors is an integer number (100510060001095).

Almost surely, 2^{201020120002189} is an apocalyptic number.

It is an amenable number.

201020120002189 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020120002189 is an equidigital number, since it uses as much as digits as its factorization.

201020120002189 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 28.

The spelling of 201020120002189 in words is "two hundred one trillion, twenty billion, one hundred twenty million, two thousand, one hundred eighty-nine".