12201121212100 has 36 divisors (see below), whose sum is σ = 26479759690384. Its totient is φ = 4879835275680.

The previous prime is 12201121212089. The next prime is 12201121212101. The reversal of 12201121212100 is 121212110221.

It is not an unprimeable number, because it can be changed into a prime (12201121212101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6864834 + ... + 8457433.

Almost surely, 2^{12201121212100} is an apocalyptic number.

12201121212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12201121212100 is an abundant number, since it is smaller than the sum of its proper divisors (14278638478284).

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

12201121212100 is a wasteful number, since it uses less digits than its factorization.

12201121212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15330244 (or 15330237 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12201121212100 its reverse (121212110221), we get a palindrome (12322333322321).

The spelling of 12201121212100 in words is "twelve trillion, two hundred one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred".