12109000 has 32 divisors (see below), whose sum is σ = 28337400. Its totient is φ = 4843200.

The previous prime is 12108961. The next prime is 12109007. The reversal of 12109000 is 90121.

It can be written as a sum of positive squares in 4 ways, for example, as 7873636 + 4235364 = 2806^2 + 2058^2 .

It is not an unprimeable number, because it can be changed into a prime (12109007) 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, 5055 + ... + 7054.

Almost surely, 2^12109000 is an apocalyptic number.

12109000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12109000 is an abundant number, since it is smaller than the sum of its proper divisors (16228400).

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

12109000 is a wasteful number, since it uses less digits than its factorization.

12109000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12130 (or 12116 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 12109000 is about 3479.7988447610. The cubic root of 12109000 is about 229.6339482879.

Adding to 12109000 its reverse (90121), we get a palindrome (12199121).

It can be divided in two parts, 1210 and 9000, that multiplied together give a square (10890000 = 3300²).

The spelling of 12109000 in words is "twelve million, one hundred nine thousand".