12320145671 has 2 divisors, whose sum is σ = 12320145672. Its totient is φ = 12320145670.

The previous prime is 12320145647. The next prime is 12320145679. The reversal of 12320145671 is 17654102321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320145671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12320145679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160072835 + 6160072836.

It is an arithmetic number, because the mean of its divisors is an integer number (6160072836).

Almost surely, 2^12320145671 is an apocalyptic number.

12320145671 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320145671 is an equidigital number, since it uses as much as digits as its factorization.

12320145671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 12320145671 its reverse (17654102321), we get a palindrome (29974247992).

The spelling of 12320145671 in words is "twelve billion, three hundred twenty million, one hundred forty-five thousand, six hundred seventy-one".