13111443312 has 80 divisors (see below), whose sum is σ = 36988977792. Its totient is φ = 3969020160.

The previous prime is 13111443311. The next prime is 13111443329. The reversal of 13111443312 is 21334411131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 (13111443311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513963 + ... + 538869.

Almost surely, 2^13111443312 is an apocalyptic number.

13111443312 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 13111443312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18494488896).

13111443312 is an abundant number, since it is smaller than the sum of its proper divisors (23877534480).

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

13111443312 is a wasteful number, since it uses less digits than its factorization.

13111443312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25926 (or 25920 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 13111443312 its reverse (21334411131), we get a palindrome (34445854443).

The spelling of 13111443312 in words is "thirteen billion, one hundred eleven million, four hundred forty-three thousand, three hundred twelve".