202002100009 has 2 divisors, whose sum is σ = 202002100010. Its totient is φ = 202002100008.

The previous prime is 202002099997. The next prime is 202002100031. The reversal of 202002100009 is 900001200202.

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., 196749909225 + 5252190784 = 443565^2 + 72472^2 .

It is a cyclic number.

It is not a de Polignac number, because 202002100009 - 2¹¹ = 202002097961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202002099965 and 202002100001.

It is not a weakly prime, because it can be changed into another prime (202002100609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101001050004 + 101001050005.

It is an arithmetic number, because the mean of its divisors is an integer number (101001050005).

Almost surely, 2^202002100009 is an apocalyptic number.

It is an amenable number.

202002100009 is a deficient number, since it is larger than the sum of its proper divisors (1).

202002100009 is an equidigital number, since it uses as much as digits as its factorization.

202002100009 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 16.

The spelling of 202002100009 in words is "two hundred two billion, two million, one hundred thousand, nine".