1312541105123 has 2 divisors, whose sum is σ = 1312541105124. Its totient is φ = 1312541105122.

The previous prime is 1312541105107. The next prime is 1312541105153. The reversal of 1312541105123 is 3215011452131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312541105123 - 2⁴ = 1312541105107 is a prime.

It is a super-2 number, since 2×1312541105123² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312541105153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656270552561 + 656270552562.

It is an arithmetic number, because the mean of its divisors is an integer number (656270552562).

Almost surely, 2^{1312541105123} is an apocalyptic number.

1312541105123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312541105123 is an equidigital number, since it uses as much as digits as its factorization.

1312541105123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 1312541105123 its reverse (3215011452131), we get a palindrome (4527552557254).

The spelling of 1312541105123 in words is "one trillion, three hundred twelve billion, five hundred forty-one million, one hundred five thousand, one hundred twenty-three".