121200211200 has 216 divisors, whose sum is σ = 417378161088. Its totient is φ = 30914723840.

The previous prime is 121200211193. The next prime is 121200211211. The reversal of 121200211200 is 2112002121.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304372 + ... + 578828.

Almost surely, 2^121200211200 is an apocalyptic number.

121200211200 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 121200211200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208689080544).

121200211200 is an abundant number, since it is smaller than the sum of its proper divisors (296177949888).

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

121200211200 is a wasteful number, since it uses less digits than its factorization.

121200211200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274509 (or 274490 counting only the distinct ones).

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

Adding to 121200211200 its reverse (2112002121), we get a palindrome (123312213321).

The spelling of 121200211200 in words is "one hundred twenty-one billion, two hundred million, two hundred eleven thousand, two hundred".