11000001209 has 2 divisors, whose sum is σ = 11000001210. Its totient is φ = 11000001208.

The previous prime is 11000001193. The next prime is 11000001239. The reversal of 11000001209 is 90210000011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10872649984 + 127351225 = 104272^2 + 11285^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000001209 - 2⁴ = 11000001193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11000001193 and 11000001202.

It is not a weakly prime, because it can be changed into another prime (11000001239) 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, 5500000604 + 5500000605.

It is an arithmetic number, because the mean of its divisors is an integer number (5500000605).

Almost surely, 2^11000001209 is an apocalyptic number.

It is an amenable number.

11000001209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000001209 is an equidigital number, since it uses as much as digits as its factorization.

11000001209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 11000001209 in words is "eleven billion, one thousand, two hundred nine".