12231311 has 2 divisors, whose sum is σ = 12231312. Its totient is φ = 12231310.

The previous prime is 12231283. The next prime is 12231367. The reversal of 12231311 is 11313221.

12231311 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12231311 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12231371) 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, 6115655 + 6115656.

It is an arithmetic number, because the mean of its divisors is an integer number (6115656).

Almost surely, 2^12231311 is an apocalyptic number.

12231311 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231311 is an equidigital number, since it uses as much as digits as its factorization.

12231311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 14.

The square root of 12231311 is about 3497.3291237743. The cubic root of 12231311 is about 230.4045243996.

Adding to 12231311 its reverse (11313221), we get a palindrome (23544532).

The spelling of 12231311 in words is "twelve million, two hundred thirty-one thousand, three hundred eleven".