31130120323 has 2 divisors, whose sum is σ = 31130120324. Its totient is φ = 31130120322.

The previous prime is 31130120321. The next prime is 31130120347. The reversal of 31130120323 is 32302103113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31130120323 - 2¹ = 31130120321 is a prime.

Together with 31130120321, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31130120323.

It is not a weakly prime, because it can be changed into another prime (31130120321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565060161 + 15565060162.

It is an arithmetic number, because the mean of its divisors is an integer number (15565060162).

Almost surely, 2^31130120323 is an apocalyptic number.

31130120323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130120323 is an equidigital number, since it uses as much as digits as its factorization.

31130120323 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 19.

Adding to 31130120323 its reverse (32302103113), we get a palindrome (63432223436).

The spelling of 31130120323 in words is "thirty-one billion, one hundred thirty million, one hundred twenty thousand, three hundred twenty-three".