12147247171 has 2 divisors, whose sum is σ = 12147247172. Its totient is φ = 12147247170.

The previous prime is 12147247159. The next prime is 12147247183. The reversal of 12147247171 is 17174274121.

It is a balanced prime because it is at equal distance from previous prime (12147247159) and next prime (12147247183).

It is a cyclic number.

It is not a de Polignac number, because 12147247171 - 2⁷ = 12147247043 is a prime.

It is a super-2 number, since 2×12147247171² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12147247171.

It is not a weakly prime, because it can be changed into another prime (12147287171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6073623585 + 6073623586.

It is an arithmetic number, because the mean of its divisors is an integer number (6073623586).

Almost surely, 2^12147247171 is an apocalyptic number.

12147247171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12147247171 is an equidigital number, since it uses as much as digits as its factorization.

12147247171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21952, while the sum is 37.

The spelling of 12147247171 in words is "twelve billion, one hundred forty-seven million, two hundred forty-seven thousand, one hundred seventy-one".