11323131231213 has 48 divisors (see below), whose sum is σ = 18085569840000. Its totient is φ = 6794608765824.

The previous prime is 11323131231197. The next prime is 11323131231227. The reversal of 11323131231213 is 31213213132311.

11323131231213 is a `hidden beast` number, since 1 + 1 + 3 + 2 + 31 + 312 + 312 + 1 + 3 = 666.

It is not a de Polignac number, because 11323131231213 - 2⁴ = 11323131231197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323131231263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9075078 + ... + 10247111.

It is an arithmetic number, because the mean of its divisors is an integer number (376782705000).

Almost surely, 2^{11323131231213} is an apocalyptic number.

It is an amenable number.

11323131231213 is a deficient number, since it is larger than the sum of its proper divisors (6762438608787).

11323131231213 is a wasteful number, since it uses less digits than its factorization.

11323131231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19322386 (or 19322383 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

Adding to 11323131231213 its reverse (31213213132311), we get a palindrome (42536344363524).

The spelling of 11323131231213 in words is "eleven trillion, three hundred twenty-three billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred thirteen".