12420804553 has 2 divisors, whose sum is σ = 12420804554. Its totient is φ = 12420804552.

The previous prime is 12420804551. The next prime is 12420804569. The reversal of 12420804553 is 35540802421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11569798969 + 851005584 = 107563^2 + 29172^2 .

It is a cyclic number.

It is not a de Polignac number, because 12420804553 - 2¹ = 12420804551 is a prime.

Together with 12420804551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12420804551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210402276 + 6210402277.

It is an arithmetic number, because the mean of its divisors is an integer number (6210402277).

Almost surely, 2^12420804553 is an apocalyptic number.

It is an amenable number.

12420804553 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420804553 is an equidigital number, since it uses as much as digits as its factorization.

12420804553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 12420804553 in words is "twelve billion, four hundred twenty million, eight hundred four thousand, five hundred fifty-three".