121221102221200 has 240 divisors, whose sum is σ = 293906882755584. Its totient is φ = 48045462336000.

The previous prime is 121221102221189. The next prime is 121221102221201. The reversal of 121221102221200 is 2122201122121.

It is not an unprimeable number, because it can be changed into a prime (121221102221201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42518799775 + ... + 42518802625.

Almost surely, 2^{121221102221200} is an apocalyptic number.

121221102221200 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 121221102221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146953441377792).

121221102221200 is an abundant number, since it is smaller than the sum of its proper divisors (172685780534384).

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

121221102221200 is a wasteful number, since it uses less digits than its factorization.

121221102221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830 (or 4819 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221102221200 its reverse (2122201122121), we get a palindrome (123343303343321).

The spelling of 121221102221200 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, two hundred".