11311233209 has 2 divisors, whose sum is σ = 11311233210. Its totient is φ = 11311233208.

The previous prime is 11311233187. The next prime is 11311233251. The reversal of 11311233209 is 90233211311.

11311233209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11130250000 + 180983209 = 105500^2 + 13453^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311233209 - 2¹² = 11311229113 is a prime.

It is not a weakly prime, because it can be changed into another prime (11311233809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655616604 + 5655616605.

It is an arithmetic number, because the mean of its divisors is an integer number (5655616605).

Almost surely, 2^11311233209 is an apocalyptic number.

It is an amenable number.

11311233209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311233209 is an equidigital number, since it uses as much as digits as its factorization.

11311233209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 11311233209 in words is "eleven billion, three hundred eleven million, two hundred thirty-three thousand, two hundred nine".