13113231312 has 40 divisors (see below), whose sum is σ = 33880911840. Its totient is φ = 4370423680.

The previous prime is 13113231301. The next prime is 13113231317. The reversal of 13113231312 is 21313231131.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113231317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388387 + ... + 420797.

It is an arithmetic number, because the mean of its divisors is an integer number (847022796).

Almost surely, 2^13113231312 is an apocalyptic number.

13113231312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13113231312 is an abundant number, since it is smaller than the sum of its proper divisors (20767680528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13113231312 is a wasteful number, since it uses less digits than its factorization.

13113231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40851 (or 40845 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 13113231312 its reverse (21313231131), we get a palindrome (34426462443).

The spelling of 13113231312 in words is "thirteen billion, one hundred thirteen million, two hundred thirty-one thousand, three hundred twelve".