12122109 has 16 divisors (see below), whose sum is σ = 18229440. Its totient is φ = 7959600.

The previous prime is 12122093. The next prime is 12122111. The reversal of 12122109 is 90122121.

12122109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12122109 - 2⁴ = 12122093 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12122091 and 12122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122119) 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, 1542 + ... + 5159.

It is an arithmetic number, because the mean of its divisors is an integer number (1139340).

Almost surely, 2^12122109 is an apocalyptic number.

It is an amenable number.

12122109 is a deficient number, since it is larger than the sum of its proper divisors (6107331).

12122109 is an equidigital number, since it uses as much as digits as its factorization.

12122109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6777 (or 6771 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12122109 is about 3481.6819211410. The cubic root of 12122109 is about 229.7167843545.

It can be divided in two parts, 1212 and 2109, that added together give a triangular number (3321 = T₈₁).

The spelling of 12122109 in words is "twelve million, one hundred twenty-two thousand, one hundred nine".