13111912 has 32 divisors (see below), whose sum is σ = 27551520. Its totient is φ = 5797440.

The previous prime is 13111907. The next prime is 13111927. The reversal of 13111912 is 21911131.

It is a self number, because there is not a number n which added to its sum of digits gives 13111912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1243 + ... + 5269.

It is an arithmetic number, because the mean of its divisors is an integer number (860985).

Almost surely, 2^13111912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13111912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13775760).

13111912 is an abundant number, since it is smaller than the sum of its proper divisors (14439608).

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

13111912 is a wasteful number, since it uses less digits than its factorization.

13111912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081 (or 4077 counting only the distinct ones).

The product of its digits is 54, while the sum is 19.

The square root of 13111912 is about 3621.0374204087. The cubic root of 13111912 is about 235.8062663633.

It can be divided in two parts, 131119 and 12, that added together give a palindrome (131131).

The spelling of 13111912 in words is "thirteen million, one hundred eleven thousand, nine hundred twelve".