121201205200 has 60 divisors (see below), whose sum is σ = 306511488160. Its totient is φ = 45928874880.

The previous prime is 121201205179. The next prime is 121201205201. The reversal of 121201205200 is 2502102121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201205201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7966164 + ... + 7981363.

Almost surely, 2^121201205200 is an apocalyptic number.

121201205200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201205200 is an abundant number, since it is smaller than the sum of its proper divisors (185310282960).

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

121201205200 is a wasteful number, since it uses less digits than its factorization.

121201205200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947564 (or 15947553 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 121201205200 its reverse (2502102121), we get a palindrome (123703307321).

The spelling of 121201205200 in words is "one hundred twenty-one billion, two hundred one million, two hundred five thousand, two hundred".