31123230071 has 2 divisors, whose sum is σ = 31123230072. Its totient is φ = 31123230070.

The previous prime is 31123230067. The next prime is 31123230113. The reversal of 31123230071 is 17003232113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31123230071 - 2² = 31123230067 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31123230371) 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, 15561615035 + 15561615036.

It is an arithmetic number, because the mean of its divisors is an integer number (15561615036).

Almost surely, 2^31123230071 is an apocalyptic number.

31123230071 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123230071 is an equidigital number, since it uses as much as digits as its factorization.

31123230071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

Adding to 31123230071 its reverse (17003232113), we get a palindrome (48126462184).

The spelling of 31123230071 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty thousand, seventy-one".