12420100647569 has 2 divisors, whose sum is σ = 12420100647570. Its totient is φ = 12420100647568.

The previous prime is 12420100647511. The next prime is 12420100647571. The reversal of 12420100647569 is 96574600102421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8846817409600 + 3573283237969 = 2974360^2 + 1890313^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420100647569 - 2²⁸ = 12419832212113 is a prime.

It is a super-2 number, since 2×12420100647569² (a number of 27 digits) contains 22 as substring.

Together with 12420100647571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12420100647509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210050323784 + 6210050323785.

It is an arithmetic number, because the mean of its divisors is an integer number (6210050323785).

Almost surely, 2^{12420100647569} is an apocalyptic number.

It is an amenable number.

12420100647569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420100647569 is an equidigital number, since it uses as much as digits as its factorization.

12420100647569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 12420100647569 in words is "twelve trillion, four hundred twenty billion, one hundred million, six hundred forty-seven thousand, five hundred sixty-nine".