2121200331 has 32 divisors (see below), whose sum is σ = 2978726400. Its totient is φ = 1340828160.

The previous prime is 2121200321. The next prime is 2121200371. The reversal of 2121200331 is 1330021212.

It is not a de Polignac number, because 2121200331 - 2¹¹ = 2121198283 is a prime.

It is a super-3 number, since 3×2121200331³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2121200331.

It is not an unprimeable number, because it can be changed into a prime (2121200321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2081140 + ... + 2082158.

It is an arithmetic number, because the mean of its divisors is an integer number (93085200).

Almost surely, 2^2121200331 is an apocalyptic number.

2121200331 is a deficient number, since it is larger than the sum of its proper divisors (857526069).

2121200331 is a wasteful number, since it uses less digits than its factorization.

2121200331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2121200331 is about 46056.4906500702. The cubic root of 2121200331 is about 1284.8740621580.

Adding to 2121200331 its reverse (1330021212), we get a palindrome (3451221543).

The spelling of 2121200331 in words is "two billion, one hundred twenty-one million, two hundred thousand, three hundred thirty-one".