12461217077 has 2 divisors, whose sum is σ = 12461217078. Its totient is φ = 12461217076.

The previous prime is 12461217023. The next prime is 12461217079. The reversal of 12461217077 is 77071216421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9477217201 + 2983999876 = 97351^2 + 54626^2 .

It is a cyclic number.

It is not a de Polignac number, because 12461217077 - 2⁸ = 12461216821 is a prime.

Together with 12461217079, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12461217077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12461217079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6230608538 + 6230608539.

It is an arithmetic number, because the mean of its divisors is an integer number (6230608539).

Almost surely, 2^12461217077 is an apocalyptic number.

It is an amenable number.

12461217077 is a deficient number, since it is larger than the sum of its proper divisors (1).

12461217077 is an equidigital number, since it uses as much as digits as its factorization.

12461217077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 38.

The spelling of 12461217077 in words is "twelve billion, four hundred sixty-one million, two hundred seventeen thousand, seventy-seven".