121133205200 has 60 divisors (see below), whose sum is σ = 332597179680. Its totient is φ = 41531383680.

The previous prime is 121133205199. The next prime is 121133205209. The reversal of 121133205200 is 2502331121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121133205209) 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, 21628130 + ... + 21633729.

It is an arithmetic number, because the mean of its divisors is an integer number (5543286328).

Almost surely, 2^121133205200 is an apocalyptic number.

121133205200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121133205200 is an abundant number, since it is smaller than the sum of its proper divisors (211463974480).

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

121133205200 is a wasteful number, since it uses less digits than its factorization.

121133205200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43261884 (or 43261873 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 121133205200 its reverse (2502331121), we get a palindrome (123635536321).

The spelling of 121133205200 in words is "one hundred twenty-one billion, one hundred thirty-three million, two hundred five thousand, two hundred".