1231342105013 has 4 divisors (see below), whose sum is σ = 1231346626848. Its totient is φ = 1231337583180.

The previous prime is 1231342104997. The next prime is 1231342105043. The reversal of 1231342105013 is 3105012431321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231342105013 - 2⁴ = 1231342104997 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 (1231342105043) 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 in 3 ways as a sum of consecutive naturals, for example, 1824353 + ... + 2406438.

It is an arithmetic number, because the mean of its divisors is an integer number (307836656712).

Almost surely, 2^{1231342105013} is an apocalyptic number.

It is an amenable number.

1231342105013 is a deficient number, since it is larger than the sum of its proper divisors (4521835).

1231342105013 is an equidigital number, since it uses as much as digits as its factorization.

1231342105013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521834.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 1231342105013 its reverse (3105012431321), we get a palindrome (4336354536334).

The spelling of 1231342105013 in words is "one trillion, two hundred thirty-one billion, three hundred forty-two million, one hundred five thousand, thirteen".