20312103231271 has 2 divisors, whose sum is σ = 20312103231272. Its totient is φ = 20312103231270.

The previous prime is 20312103231269. The next prime is 20312103231289. The reversal of 20312103231271 is 17213230121302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20312103231271 - 2¹ = 20312103231269 is a prime.

Together with 20312103231269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312103232271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156051615635 + 10156051615636.

It is an arithmetic number, because the mean of its divisors is an integer number (10156051615636).

Almost surely, 2^{20312103231271} is an apocalyptic number.

20312103231271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312103231271 is an equidigital number, since it uses as much as digits as its factorization.

20312103231271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 20312103231271 its reverse (17213230121302), we get a palindrome (37525333352573).

The spelling of 20312103231271 in words is "twenty trillion, three hundred twelve billion, one hundred three million, two hundred thirty-one thousand, two hundred seventy-one".