1312124040505 has 16 divisors (see below), whose sum is σ = 1584687436560. Its totient is φ = 1042941100032.

The previous prime is 1312124040499. The next prime is 1312124040509. The reversal of 1312124040505 is 5050404212131.

It can be written as a sum of positive squares in 8 ways, for example, as 58996037881 + 1253128002624 = 242891^2 + 1119432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312124040505 - 2¹⁷ = 1312123909433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312124040509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13246201 + ... + 13344889.

It is an arithmetic number, because the mean of its divisors is an integer number (99042964785).

Almost surely, 2^{1312124040505} is an apocalyptic number.

It is an amenable number.

1312124040505 is a deficient number, since it is larger than the sum of its proper divisors (272563396055).

1312124040505 is a wasteful number, since it uses less digits than its factorization.

1312124040505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115788.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1312124040505 its reverse (5050404212131), we get a palindrome (6362528252636).

The spelling of 1312124040505 in words is "one trillion, three hundred twelve billion, one hundred twenty-four million, forty thousand, five hundred five".