12121402717 has 2 divisors, whose sum is σ = 12121402718. Its totient is φ = 12121402716.

The previous prime is 12121402703. The next prime is 12121402771. The reversal of 12121402717 is 71720412121.

It is a happy number.

Together with next prime (12121402771) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7379840836 + 4741561881 = 85906^2 + 68859^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121402717 - 2⁷ = 12121402589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121402417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060701358 + 6060701359.

It is an arithmetic number, because the mean of its divisors is an integer number (6060701359).

Almost surely, 2^12121402717 is an apocalyptic number.

It is an amenable number.

12121402717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121402717 is an equidigital number, since it uses as much as digits as its factorization.

12121402717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 28.

Adding to 12121402717 its reverse (71720412121), we get a palindrome (83841814838).

The spelling of 12121402717 in words is "twelve billion, one hundred twenty-one million, four hundred two thousand, seven hundred seventeen".