11203134209 has 2 divisors, whose sum is σ = 11203134210. Its totient is φ = 11203134208.

The previous prime is 11203134199. The next prime is 11203134211. The reversal of 11203134209 is 90243130211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7762138609 + 3440995600 = 88103^2 + 58660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11203134209 is a prime.

It is a super-2 number, since 2×11203134209² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 11203134211, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11203134809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601567104 + 5601567105.

It is an arithmetic number, because the mean of its divisors is an integer number (5601567105).

Almost surely, 2^11203134209 is an apocalyptic number.

It is an amenable number.

11203134209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11203134209 is an equidigital number, since it uses as much as digits as its factorization.

11203134209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 11203134209 in words is "eleven billion, two hundred three million, one hundred thirty-four thousand, two hundred nine".