11203231709 has 2 divisors, whose sum is σ = 11203231710. Its totient is φ = 11203231708.

The previous prime is 11203231691. The next prime is 11203231723. The reversal of 11203231709 is 90713230211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11201047225 + 2184484 = 105835^2 + 1478^2 .

It is an emirp because it is prime and its reverse (90713230211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11203231709 - 2²⁴ = 11186454493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11203231789) 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, 5601615854 + 5601615855.

It is an arithmetic number, because the mean of its divisors is an integer number (5601615855).

Almost surely, 2^11203231709 is an apocalyptic number.

It is an amenable number.

11203231709 is a deficient number, since it is larger than the sum of its proper divisors (1).

11203231709 is an equidigital number, since it uses as much as digits as its factorization.

11203231709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 29.

The spelling of 11203231709 in words is "eleven billion, two hundred three million, two hundred thirty-one thousand, seven hundred nine".