11111020200209 has 2 divisors, whose sum is σ = 11111020200210. Its totient is φ = 11111020200208.

The previous prime is 11111020200199. The next prime is 11111020200223. The reversal of 11111020200209 is 90200202011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11008812110209 + 102208090000 = 3317953^2 + 319700^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111020200209 - 2²⁴ = 11111003422993 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111020200289) 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, 5555510100104 + 5555510100105.

It is an arithmetic number, because the mean of its divisors is an integer number (5555510100105).

Almost surely, 2^{11111020200209} is an apocalyptic number.

It is an amenable number.

11111020200209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111020200209 is an equidigital number, since it uses as much as digits as its factorization.

11111020200209 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 20.

The spelling of 11111020200209 in words is "eleven trillion, one hundred eleven billion, twenty million, two hundred thousand, two hundred nine".