12051109 has 6 divisors (see below), whose sum is σ = 14018694. Its totient is φ = 10329480.

The previous prime is 12051107. The next prime is 12051119. The reversal of 12051109 is 90115021.

It can be written as a sum of positive squares in only one way, i.e., 8236900 + 3814209 = 2870^2 + 1953^2 .

It is not a de Polignac number, because 12051109 - 2¹ = 12051107 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 (12051101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122922 + ... + 123019.

It is an arithmetic number, because the mean of its divisors is an integer number (2336449).

Almost surely, 2^12051109 is an apocalyptic number.

It is an amenable number.

12051109 is a deficient number, since it is larger than the sum of its proper divisors (1967585).

12051109 is an equidigital number, since it uses as much as digits as its factorization.

12051109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245955 (or 245948 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 12051109 is about 3471.4707257876. The cubic root of 12051109 is about 229.2674170478.

The spelling of 12051109 in words is "twelve million, fifty-one thousand, one hundred nine".