201065021 has 2 divisors, whose sum is σ = 201065022. Its totient is φ = 201065020.

The previous prime is 201064999. The next prime is 201065071. The reversal of 201065021 is 120560102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177928921 + 23136100 = 13339^2 + 4810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201065021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201065071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100532510 + 100532511.

It is an arithmetic number, because the mean of its divisors is an integer number (100532511).

Almost surely, 2^201065021 is an apocalyptic number.

It is an amenable number.

201065021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201065021 is an equidigital number, since it uses as much as digits as its factorization.

201065021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 201065021 is about 14179.7398072038. The cubic root of 201065021 is about 585.8397572702.

The spelling of 201065021 in words is "two hundred one million, sixty-five thousand, twenty-one".