12420100647571 has 2 divisors, whose sum is σ = 12420100647572. Its totient is φ = 12420100647570.

The previous prime is 12420100647569. The next prime is 12420100647593. The reversal of 12420100647571 is 17574600102421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12420100647571 - 2¹ = 12420100647569 is a prime.

Together with 12420100647569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12420100647511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210050323785 + 6210050323786.

It is an arithmetic number, because the mean of its divisors is an integer number (6210050323786).

Almost surely, 2^{12420100647571} is an apocalyptic number.

12420100647571 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420100647571 is an equidigital number, since it uses as much as digits as its factorization.

12420100647571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

Adding to 12420100647571 its reverse (17574600102421), we get a palindrome (29994700749992).

The spelling of 12420100647571 in words is "twelve trillion, four hundred twenty billion, one hundred million, six hundred forty-seven thousand, five hundred seventy-one".