1131323313213 has 24 divisors (see below), whose sum is σ = 1731009079800. Its totient is φ = 709542273024.

The previous prime is 1131323313163. The next prime is 1131323313311. The reversal of 1131323313213 is 3123133231311.

1131323313213 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 3 + 2 + 331 + 321 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 400267532889 + 731055780324 = 632667^2 + 855018^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1131323313213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131323313413) 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, 1247908 + ... + 1954461.

It is an arithmetic number, because the mean of its divisors is an integer number (72125378325).

Almost surely, 2^{1131323313213} is an apocalyptic number.

It is an amenable number.

1131323313213 is a deficient number, since it is larger than the sum of its proper divisors (599685766587).

1131323313213 is a wasteful number, since it uses less digits than its factorization.

1131323313213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204701 (or 3204698 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

Adding to 1131323313213 its reverse (3123133231311), we get a palindrome (4254456544524).

The spelling of 1131323313213 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-three million, three hundred thirteen thousand, two hundred thirteen".