2121203200 has 60 divisors (see below), whose sum is σ = 5255478360. Its totient is φ = 848476160.

The previous prime is 2121203177. The next prime is 2121203207. The reversal of 2121203200 is 23021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121203207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70060 + ... + 95659.

It is an arithmetic number, because the mean of its divisors is an integer number (87591306).

Almost surely, 2^2121203200 is an apocalyptic number.

2121203200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121203200 is an abundant number, since it is smaller than the sum of its proper divisors (3134275160).

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

2121203200 is an equidigital number, since it uses as much as digits as its factorization.

2121203200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165747 (or 165726 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2121203200 is about 46056.5217965925. The cubic root of 2121203200 is about 1284.8746414372.

Adding to 2121203200 its reverse (23021212), we get a palindrome (2144224412).

The spelling of 2121203200 in words is "two billion, one hundred twenty-one million, two hundred three thousand, two hundred".