31312122071 has 2 divisors, whose sum is σ = 31312122072. Its totient is φ = 31312122070.

The previous prime is 31312122031. The next prime is 31312122077. The reversal of 31312122071 is 17022121313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31312122071 - 2¹⁰ = 31312121047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312122077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656061035 + 15656061036.

It is an arithmetic number, because the mean of its divisors is an integer number (15656061036).

Almost surely, 2^31312122071 is an apocalyptic number.

31312122071 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312122071 is an equidigital number, since it uses as much as digits as its factorization.

31312122071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 31312122071 its reverse (17022121313), we get a palindrome (48334243384).

The spelling of 31312122071 in words is "thirty-one billion, three hundred twelve million, one hundred twenty-two thousand, seventy-one".