12009100 has 18 divisors (see below), whose sum is σ = 26059964. Its totient is φ = 4803600.

The previous prime is 12009091. The next prime is 12009119. The reversal of 12009100 is 190021.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59946 + ... + 60145.

Almost surely, 2^12009100 is an apocalyptic number.

12009100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12009100 is an abundant number, since it is smaller than the sum of its proper divisors (14050864).

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

12009100 is a wasteful number, since it uses less digits than its factorization.

12009100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120105 (or 120098 counting only the distinct ones).

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

The square root of 12009100 is about 3465.4148380822. The cubic root of 12009100 is about 229.0007055526. Note that the first 3 decimals are identical.

Adding to 12009100 its reverse (190021), we get a palindrome (12199121).

The spelling of 12009100 in words is "twelve million, nine thousand, one hundred".