10809121 has 4 divisors (see below), whose sum is σ = 10916244. Its totient is φ = 10702000.

The previous prime is 10809101. The next prime is 10809133. The reversal of 10809121 is 12190801.

10809121 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5239521 + 5569600 = 2289^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 10809121 - 2⁵ = 10809089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10809092 and 10809101.

It is not an unprimeable number, because it can be changed into a prime (10809101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53410 + ... + 53611.

It is an arithmetic number, because the mean of its divisors is an integer number (2729061).

Almost surely, 2^10809121 is an apocalyptic number.

It is an amenable number.

10809121 is a deficient number, since it is larger than the sum of its proper divisors (107123).

10809121 is a wasteful number, since it uses less digits than its factorization.

10809121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107122.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 10809121 is about 3287.7227681178. The cubic root of 10809121 is about 221.1040984302.

Adding to 10809121 its reverse (12190801), we get a palindrome (22999922).

It can be divided in two parts, 1080 and 9121, that added together give a palindrome (10201).

The spelling of 10809121 in words is "ten million, eight hundred nine thousand, one hundred twenty-one".