12720514171 has 2 divisors, whose sum is σ = 12720514172. Its totient is φ = 12720514170.

The previous prime is 12720514099. The next prime is 12720514189. The reversal of 12720514171 is 17141502721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12720514171 - 2⁷ = 12720514043 is a prime.

It is a super-2 number, since 2×12720514171² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12720514871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360257085 + 6360257086.

It is an arithmetic number, because the mean of its divisors is an integer number (6360257086).

Almost surely, 2^12720514171 is an apocalyptic number.

12720514171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12720514171 is an equidigital number, since it uses as much as digits as its factorization.

12720514171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 31.

It can be divided in two parts, 127205 and 14171, that added together give a square (141376 = 376²).

The spelling of 12720514171 in words is "twelve billion, seven hundred twenty million, five hundred fourteen thousand, one hundred seventy-one".