12239271871 has 2 divisors, whose sum is σ = 12239271872. Its totient is φ = 12239271870.

The previous prime is 12239271817. The next prime is 12239271883. The reversal of 12239271871 is 17817293221.

Together with previous prime (12239271817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12239271871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12239275871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119635935 + 6119635936.

It is an arithmetic number, because the mean of its divisors is an integer number (6119635936).

Almost surely, 2^12239271871 is an apocalyptic number.

12239271871 is a deficient number, since it is larger than the sum of its proper divisors (1).

12239271871 is an equidigital number, since it uses as much as digits as its factorization.

12239271871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The spelling of 12239271871 in words is "twelve billion, two hundred thirty-nine million, two hundred seventy-one thousand, eight hundred seventy-one".