201020101121209 has 2 divisors, whose sum is σ = 201020101121210. Its totient is φ = 201020101121208.

The previous prime is 201020101121183. The next prime is 201020101121221. The reversal of 201020101121209 is 902121101020102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147644978355625 + 53375122765584 = 12150925^2 + 7305828^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020101121209 - 2¹¹ = 201020101119161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201020101121209.

It is not a weakly prime, because it can be changed into another prime (201020101121269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510050560604 + 100510050560605.

It is an arithmetic number, because the mean of its divisors is an integer number (100510050560605).

Almost surely, 2^{201020101121209} is an apocalyptic number.

It is an amenable number.

201020101121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020101121209 is an equidigital number, since it uses as much as digits as its factorization.

201020101121209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 201020101121209 in words is "two hundred one trillion, twenty billion, one hundred one million, one hundred twenty-one thousand, two hundred nine".