2121003200 has 42 divisors (see below), whose sum is σ = 5218997436. Its totient is φ = 848400640.

The previous prime is 2121003197. The next prime is 2121003211. The reversal of 2121003200 is 23001212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661214 + ... + 664413.

Almost surely, 2^2121003200 is an apocalyptic number.

2121003200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121003200 is an abundant number, since it is smaller than the sum of its proper divisors (3097994236).

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

2121003200 is a wasteful number, since it uses less digits than its factorization.

2121003200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325649 (or 1325634 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2121003200 is about 46054.3505002513. The cubic root of 2121003200 is about 1284.8342582237.

Adding to 2121003200 its reverse (23001212), we get a palindrome (2144004412).

The spelling of 2121003200 in words is "two billion, one hundred twenty-one million, three thousand, two hundred".