13021116 has 96 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 3763200.

The previous prime is 13021079. The next prime is 13021117. The reversal of 13021116 is 61112031.

It is a junction number, because it is equal to n+sod(n) for n = 13021095 and 13021104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183361 + ... + 183431.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^13021116 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 13021116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17418240).

13021116 is an abundant number, since it is smaller than the sum of its proper divisors (21815364).

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

13021116 is a wasteful number, since it uses less digits than its factorization.

13021116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 13021116 is about 3608.4783496649. The cubic root of 13021116 is about 235.2607096049.

Adding to 13021116 its reverse (61112031), we get a palindrome (74133147).

The spelling of 13021116 in words is "thirteen million, twenty-one thousand, one hundred sixteen".