1231231321313 has 16 divisors (see below), whose sum is σ = 1419980753280. Its totient is φ = 1045702054656.

The previous prime is 1231231321301. The next prime is 1231231321357. The reversal of 1231231321313 is 3131231321321.

It is not a de Polignac number, because 1231231321313 - 2⁶ = 1231231321249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231231321373) 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 in 15 ways as a sum of consecutive naturals, for example, 2560658 + ... + 3003236.

It is an arithmetic number, because the mean of its divisors is an integer number (88748797080).

Almost surely, 2^{1231231321313} is an apocalyptic number.

It is an amenable number.

1231231321313 is a deficient number, since it is larger than the sum of its proper divisors (188749431967).

1231231321313 is a wasteful number, since it uses less digits than its factorization.

1231231321313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446216.

The product of its digits is 1944, while the sum is 26.

Adding to 1231231321313 its reverse (3131231321321), we get a palindrome (4362462642634).

The spelling of 1231231321313 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred thirteen".