12205100 has 18 divisors (see below), whose sum is σ = 26485284. Its totient is φ = 4882000.

The previous prime is 12205097. The next prime is 12205117. The reversal of 12205100 is 150221.

12205100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 14.

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, 60926 + ... + 61125.

Almost surely, 2^12205100 is an apocalyptic number.

12205100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12205100 is an abundant number, since it is smaller than the sum of its proper divisors (14280184).

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

12205100 is a wasteful number, since it uses less digits than its factorization.

12205100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122065 (or 122058 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 12205100 is about 3493.5798259092. The cubic root of 12205100 is about 230.2398254568.

Adding to 12205100 its reverse (150221), we get a palindrome (12355321).

The spelling of 12205100 in words is "twelve million, two hundred five thousand, one hundred".