1311240325231 has 2 divisors, whose sum is σ = 1311240325232. Its totient is φ = 1311240325230.

The previous prime is 1311240325189. The next prime is 1311240325259. The reversal of 1311240325231 is 1325230421131.

It is an a-pointer prime, because the next prime (1311240325259) can be obtained adding 1311240325231 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311240325231 - 2²⁷ = 1311106107503 is a prime.

It is a super-2 number, since 2×1311240325231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1311240325231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311240325271) 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, 655620162615 + 655620162616.

It is an arithmetic number, because the mean of its divisors is an integer number (655620162616).

Almost surely, 2^{1311240325231} is an apocalyptic number.

1311240325231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311240325231 is an equidigital number, since it uses as much as digits as its factorization.

1311240325231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 1311240325231 its reverse (1325230421131), we get a palindrome (2636470746362).

The spelling of 1311240325231 in words is "one trillion, three hundred eleven billion, two hundred forty million, three hundred twenty-five thousand, two hundred thirty-one".