201002221109 has 2 divisors, whose sum is σ = 201002221110. Its totient is φ = 201002221108.

The previous prime is 201002221099. The next prime is 201002221171. The reversal of 201002221109 is 901122200102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200796298609 + 205922500 = 448103^2 + 14350^2 .

It is a cyclic number.

It is not a de Polignac number, because 201002221109 - 2⁴ = 201002221093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201002221009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100501110554 + 100501110555.

It is an arithmetic number, because the mean of its divisors is an integer number (100501110555).

Almost surely, 2^201002221109 is an apocalyptic number.

It is an amenable number.

201002221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

201002221109 is an equidigital number, since it uses as much as digits as its factorization.

201002221109 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 20.

The spelling of 201002221109 in words is "two hundred one billion, two million, two hundred twenty-one thousand, one hundred nine".