12405102121543 has 2 divisors, whose sum is σ = 12405102121544. Its totient is φ = 12405102121542.

The previous prime is 12405102121541. The next prime is 12405102121553. The reversal of 12405102121543 is 34512120150421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12405102121543 - 2¹ = 12405102121541 is a prime.

Together with 12405102121541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12405102121541) 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, 6202551060771 + 6202551060772.

It is an arithmetic number, because the mean of its divisors is an integer number (6202551060772).

Almost surely, 2^{12405102121543} is an apocalyptic number.

12405102121543 is a deficient number, since it is larger than the sum of its proper divisors (1).

12405102121543 is an equidigital number, since it uses as much as digits as its factorization.

12405102121543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 12405102121543 its reverse (34512120150421), we get a palindrome (46917222271964).

The spelling of 12405102121543 in words is "twelve trillion, four hundred five billion, one hundred two million, one hundred twenty-one thousand, five hundred forty-three".