20002001200109 has 2 divisors, whose sum is σ = 20002001200110. Its totient is φ = 20002001200108.

The previous prime is 20002001200061. The next prime is 20002001200117. The reversal of 20002001200109 is 90100210020002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15515547684484 + 4486453515625 = 3938978^2 + 2118125^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002001200109 - 2¹² = 20002001196013 is a prime.

It is a super-2 number, since 2×20002001200109² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002001200199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001000600054 + 10001000600055.

It is an arithmetic number, because the mean of its divisors is an integer number (10001000600055).

Almost surely, 2^{20002001200109} is an apocalyptic number.

It is an amenable number.

20002001200109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002001200109 is an equidigital number, since it uses as much as digits as its factorization.

20002001200109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 20002001200109 in words is "twenty trillion, two billion, one million, two hundred thousand, one hundred nine".