12126516841 has 2 divisors, whose sum is σ = 12126516842. Its totient is φ = 12126516840.

The previous prime is 12126516839. The next prime is 12126516881. The reversal of 12126516841 is 14861562121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12095380441 + 31136400 = 109979^2 + 5580^2 .

It is a cyclic number.

It is not a de Polignac number, because 12126516841 - 2¹ = 12126516839 is a prime.

Together with 12126516839, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12126516841.

It is not a weakly prime, because it can be changed into another prime (12126516811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6063258420 + 6063258421.

It is an arithmetic number, because the mean of its divisors is an integer number (6063258421).

Almost surely, 2^12126516841 is an apocalyptic number.

It is an amenable number.

12126516841 is a deficient number, since it is larger than the sum of its proper divisors (1).

12126516841 is an equidigital number, since it uses as much as digits as its factorization.

12126516841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 37.

The spelling of 12126516841 in words is "twelve billion, one hundred twenty-six million, five hundred sixteen thousand, eight hundred forty-one".