1231310111013 has 24 divisors (see below), whose sum is σ = 1826690981856. Its totient is φ = 798660194400.

The previous prime is 1231310111011. The next prime is 1231310111021. The reversal of 1231310111013 is 3101110131321.

1231310111013 is a `hidden beast` number, since 1 + 231 + 310 + 1 + 110 + 13 = 666.

It is not a de Polignac number, because 1231310111013 - 2¹ = 1231310111011 is a prime.

It is a super-2 number, since 2×1231310111013² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231310111011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14987658 + ... + 15069588.

It is an arithmetic number, because the mean of its divisors is an integer number (76112124244).

Almost surely, 2^{1231310111013} is an apocalyptic number.

It is an amenable number.

1231310111013 is a deficient number, since it is larger than the sum of its proper divisors (595380870843).

1231310111013 is a wasteful number, since it uses less digits than its factorization.

1231310111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127105 (or 127102 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 1231310111013 its reverse (3101110131321), we get a palindrome (4332420242334).

The spelling of 1231310111013 in words is "one trillion, two hundred thirty-one billion, three hundred ten million, one hundred eleven thousand, thirteen".