13111212312 has 128 divisors (see below), whose sum is σ = 40324435200. Its totient is φ = 3913747200.

The previous prime is 13111212299. The next prime is 13111212343. The reversal of 13111212312 is 21321211131.

13111212312 is a `hidden beast` number, since 1 + 311 + 121 + 231 + 2 = 666.

13111212312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118012 + ... + 200372.

It is an arithmetic number, because the mean of its divisors is an integer number (315034650).

Almost surely, 2^13111212312 is an apocalyptic number.

13111212312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13111212312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20162217600).

13111212312 is an abundant number, since it is smaller than the sum of its proper divisors (27213222888).

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

13111212312 is a wasteful number, since it uses less digits than its factorization.

13111212312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82454 (or 82444 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 13111212312 its reverse (21321211131), we get a palindrome (34432423443).

The spelling of 13111212312 in words is "thirteen billion, one hundred eleven million, two hundred twelve thousand, three hundred twelve".