1312123012013 has 64 divisors (see below), whose sum is σ = 1583655058944. Its totient is φ = 1073544192000.

The previous prime is 1312123012009. The next prime is 1312123012019. The reversal of 1312123012013 is 3102103212131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1312123012013 - 2² = 1312123012009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312123012019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94166795 + ... + 94180727.

It is an arithmetic number, because the mean of its divisors is an integer number (24744610296).

Almost surely, 2^{1312123012013} is an apocalyptic number.

It is an amenable number.

1312123012013 is a deficient number, since it is larger than the sum of its proper divisors (271532046931).

1312123012013 is a wasteful number, since it uses less digits than its factorization.

1312123012013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14246.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1312123012013 its reverse (3102103212131), we get a palindrome (4414226224144).

The spelling of 1312123012013 in words is "one trillion, three hundred twelve billion, one hundred twenty-three million, twelve thousand, thirteen".