11431321211 has 2 divisors, whose sum is σ = 11431321212. Its totient is φ = 11431321210.

The previous prime is 11431321201. The next prime is 11431321261. The reversal of 11431321211 is 11212313411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11431321211 - 2¹⁴ = 11431304827 is a prime.

It is not a weakly prime, because it can be changed into another prime (11431321201) 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, 5715660605 + 5715660606.

It is an arithmetic number, because the mean of its divisors is an integer number (5715660606).

Almost surely, 2^11431321211 is an apocalyptic number.

11431321211 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431321211 is an equidigital number, since it uses as much as digits as its factorization.

11431321211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

Adding to 11431321211 its reverse (11212313411), we get a palindrome (22643634622).

The spelling of 11431321211 in words is "eleven billion, four hundred thirty-one million, three hundred twenty-one thousand, two hundred eleven".