121200120200 has 48 divisors (see below), whose sum is σ = 282526202880. Its totient is φ = 48353437760.

The previous prime is 121200120199. The next prime is 121200120203. The reversal of 121200120200 is 2021002121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121200120203) 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, 714524 + ... + 867723.

It is an arithmetic number, because the mean of its divisors is an integer number (5885962560).

Almost surely, 2^121200120200 is an apocalyptic number.

121200120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200120200 is an abundant number, since it is smaller than the sum of its proper divisors (161326082680).

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

121200120200 is a wasteful number, since it uses less digits than its factorization.

121200120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582646 (or 1582637 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121200120200 its reverse (2021002121), we get a palindrome (123221122321).

The spelling of 121200120200 in words is "one hundred twenty-one billion, two hundred million, one hundred twenty thousand, two hundred".