13021109 has 8 divisors (see below), whose sum is σ = 13201848. Its totient is φ = 12841920.

The previous prime is 13021079. The next prime is 13021117. The reversal of 13021109 is 90112031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 792100 + 12229009 = 890^2 + 3497^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13021109 - 2⁸ = 13020853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021139) 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, 30719 + ... + 31139.

It is an arithmetic number, because the mean of its divisors is an integer number (1650231).

Almost surely, 2^13021109 is an apocalyptic number.

It is an amenable number.

13021109 is a deficient number, since it is larger than the sum of its proper divisors (180739).

13021109 is a wasteful number, since it uses less digits than its factorization.

13021109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 13021109 is about 3608.4773797268. The cubic root of 13021109 is about 235.2606674470.

The spelling of 13021109 in words is "thirteen million, twenty-one thousand, one hundred nine".