311231251141 has 2 divisors, whose sum is σ = 311231251142. Its totient is φ = 311231251140.

The previous prime is 311231251117. The next prime is 311231251147. The reversal of 311231251141 is 141152132113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186346759041 + 124884492100 = 431679^2 + 353390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311231251141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311231251147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155615625570 + 155615625571.

It is an arithmetic number, because the mean of its divisors is an integer number (155615625571).

Almost surely, 2^311231251141 is an apocalyptic number.

It is an amenable number.

311231251141 is a deficient number, since it is larger than the sum of its proper divisors (1).

311231251141 is an equidigital number, since it uses as much as digits as its factorization.

311231251141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 25.

Adding to 311231251141 its reverse (141152132113), we get a palindrome (452383383254).

The spelling of 311231251141 in words is "three hundred eleven billion, two hundred thirty-one million, two hundred fifty-one thousand, one hundred forty-one".