31120311323 has 2 divisors, whose sum is σ = 31120311324. Its totient is φ = 31120311322.

The previous prime is 31120311319. The next prime is 31120311331. The reversal of 31120311323 is 32311302113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31120311323 - 2² = 31120311319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31120311295 and 31120311304.

It is not a weakly prime, because it can be changed into another prime (31120311373) 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, 15560155661 + 15560155662.

It is an arithmetic number, because the mean of its divisors is an integer number (15560155662).

Almost surely, 2^31120311323 is an apocalyptic number.

31120311323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120311323 is an equidigital number, since it uses as much as digits as its factorization.

31120311323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31120311323 its reverse (32311302113), we get a palindrome (63431613436).

The spelling of 31120311323 in words is "thirty-one billion, one hundred twenty million, three hundred eleven thousand, three hundred twenty-three".