12121222110200 has 144 divisors (see below), whose sum is σ = 32808191157000. Its totient is φ = 4152648864000.

The previous prime is 12121222110181. The next prime is 12121222110203. The reversal of 12121222110200 is 201122212121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121222110203) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12274451 + ... + 13225149.

Almost surely, 2^{12121222110200} is an apocalyptic number.

12121222110200 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 12121222110200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16404095578500).

12121222110200 is an abundant number, since it is smaller than the sum of its proper divisors (20686969046800).

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

12121222110200 is a wasteful number, since it uses less digits than its factorization.

12121222110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952030 (or 952014 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121222110200 its reverse (201122212121), we get a palindrome (12322344322321).

The spelling of 12121222110200 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred ten thousand, two hundred".