12201022100 has 72 divisors (see below), whose sum is σ = 28026435360. Its totient is φ = 4602487680.

The previous prime is 12201022091. The next prime is 12201022117. The reversal of 12201022100 is 122010221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75779 + ... + 173621.

Almost surely, 2^12201022100 is an apocalyptic number.

12201022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12201022100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14013217680).

12201022100 is an abundant number, since it is smaller than the sum of its proper divisors (15825413260).

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

12201022100 is a wasteful number, since it uses less digits than its factorization.

12201022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97929 (or 97922 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12201022100 its reverse (122010221), we get a palindrome (12323032321).

12201022100 divided by its reverse (122010221) gives a square (100 = 10²).

The spelling of 12201022100 in words is "twelve billion, two hundred one million, twenty-two thousand, one hundred".