20111101110209 has 2 divisors, whose sum is σ = 20111101110210. Its totient is φ = 20111101110208.

The previous prime is 20111101110187. The next prime is 20111101110227. The reversal of 20111101110209 is 90201110111102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11008812110209 + 9102289000000 = 3317953^2 + 3017000^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111101110209 - 2¹⁶ = 20111101044673 is a prime.

It is not a weakly prime, because it can be changed into another prime (20111101110239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055550555104 + 10055550555105.

It is an arithmetic number, because the mean of its divisors is an integer number (10055550555105).

Almost surely, 2^{20111101110209} is an apocalyptic number.

It is an amenable number.

20111101110209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111101110209 is an equidigital number, since it uses as much as digits as its factorization.

20111101110209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 20111101110209 in words is "twenty trillion, one hundred eleven billion, one hundred one million, one hundred ten thousand, two hundred nine".