12201100 has 18 divisors (see below), whose sum is σ = 26476604. Its totient is φ = 4880400.

The previous prime is 12201089. The next prime is 12201131. The reversal of 12201100 is 110221.

12201100 is nontrivially palindromic in base 7.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60906 + ... + 61105.

Almost surely, 2^12201100 is an apocalyptic number.

12201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12201100 is an abundant number, since it is smaller than the sum of its proper divisors (14275504).

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

12201100 is a wasteful number, since it uses less digits than its factorization.

12201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122025 (or 122018 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12201100 is about 3493.0073003073. The cubic root of 12201100 is about 230.2146704006.

Adding to 12201100 its reverse (110221), we get a palindrome (12311321).

The spelling of 12201100 in words is "twelve million, two hundred one thousand, one hundred".