20112102211009 has 2 divisors, whose sum is σ = 20112102211010. Its totient is φ = 20112102211008.

The previous prime is 20112102211001. The next prime is 20112102211039. The reversal of 20112102211009 is 90011220121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14824401961009 + 5287700250000 = 3850247^2 + 2299500^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112102211009 - 2³ = 20112102211001 is a prime.

It is not a weakly prime, because it can be changed into another prime (20112102211001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056051105504 + 10056051105505.

It is an arithmetic number, because the mean of its divisors is an integer number (10056051105505).

Almost surely, 2^{20112102211009} is an apocalyptic number.

It is an amenable number.

20112102211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112102211009 is an equidigital number, since it uses as much as digits as its factorization.

20112102211009 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 20112102211009 in words is "twenty trillion, one hundred twelve billion, one hundred two million, two hundred eleven thousand, nine".