12420260156543 has 2 divisors, whose sum is σ = 12420260156544. Its totient is φ = 12420260156542.

The previous prime is 12420260156527. The next prime is 12420260156567. The reversal of 12420260156543 is 34565106202421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12420260156543 - 2⁴ = 12420260156527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12420260156543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12420260156503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210130078271 + 6210130078272.

It is an arithmetic number, because the mean of its divisors is an integer number (6210130078272).

Almost surely, 2^{12420260156543} is an apocalyptic number.

12420260156543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420260156543 is an equidigital number, since it uses as much as digits as its factorization.

12420260156543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 41.

Adding to 12420260156543 its reverse (34565106202421), we get a palindrome (46985366358964).

The spelling of 12420260156543 in words is "twelve trillion, four hundred twenty billion, two hundred sixty million, one hundred fifty-six thousand, five hundred forty-three".