12907123217 has 2 divisors, whose sum is σ = 12907123218. Its totient is φ = 12907123216.

The previous prime is 12907123193. The next prime is 12907123223. The reversal of 12907123217 is 71232170921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12907004881 + 118336 = 113609^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 12907123217 - 2⁶ = 12907123153 is a prime.

It is not a weakly prime, because it can be changed into another prime (12907123717) 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, 6453561608 + 6453561609.

It is an arithmetic number, because the mean of its divisors is an integer number (6453561609).

Almost surely, 2^12907123217 is an apocalyptic number.

It is an amenable number.

12907123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12907123217 is an equidigital number, since it uses as much as digits as its factorization.

12907123217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 12907123217 in words is "twelve billion, nine hundred seven million, one hundred twenty-three thousand, two hundred seventeen".