31311123312043 has 2 divisors, whose sum is σ = 31311123312044. Its totient is φ = 31311123312042.

The previous prime is 31311123312041. The next prime is 31311123312281. The reversal of 31311123312043 is 34021332111313.

It is a weak prime.

It is an emirp because it is prime and its reverse (34021332111313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31311123312043 - 2¹ = 31311123312041 is a prime.

Together with 31311123312041, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31311123312041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655561656021 + 15655561656022.

It is an arithmetic number, because the mean of its divisors is an integer number (15655561656022).

Almost surely, 2^{31311123312043} is an apocalyptic number.

31311123312043 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311123312043 is an equidigital number, since it uses as much as digits as its factorization.

31311123312043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 31311123312043 its reverse (34021332111313), we get a palindrome (65332455423356).

The spelling of 31311123312043 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-three million, three hundred twelve thousand, forty-three".