20001012200009 has 2 divisors, whose sum is σ = 20001012200010. Its totient is φ = 20001012200008.

The previous prime is 20001012200003. The next prime is 20001012200053. The reversal of 20001012200009 is 90000221010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19542721111225 + 458291088784 = 4420715^2 + 676972^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001012200009 - 2⁴⁰ = 18901500572233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001012200009.

It is not a weakly prime, because it can be changed into another prime (20001012200003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000506100004 + 10000506100005.

It is an arithmetic number, because the mean of its divisors is an integer number (10000506100005).

Almost surely, 2^{20001012200009} is an apocalyptic number.

It is an amenable number.

20001012200009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001012200009 is an equidigital number, since it uses as much as digits as its factorization.

20001012200009 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 20001012200009 in words is "twenty trillion, one billion, twelve million, two hundred thousand, nine".