121020211200 has 672 divisors, whose sum is σ = 481707383040. Its totient is φ = 26188185600.

The previous prime is 121020211159. The next prime is 121020211259. The reversal of 121020211200 is 2112020121.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81714460 + ... + 81715940.

Almost surely, 2^121020211200 is an apocalyptic number.

121020211200 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 121020211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240853691520).

121020211200 is an abundant number, since it is smaller than the sum of its proper divisors (360687171840).

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

121020211200 is a wasteful number, since it uses less digits than its factorization.

121020211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121020211200 its reverse (2112020121), we get a palindrome (123132231321).

The spelling of 121020211200 in words is "one hundred twenty-one billion, twenty million, two hundred eleven thousand, two hundred".