2331021321 has 40 divisors (see below), whose sum is σ = 3579509120. Its totient is φ = 1511164512.

The previous prime is 2331021313. The next prime is 2331021323. The reversal of 2331021321 is 1231201332.

It is not a de Polignac number, because 2331021321 - 2³ = 2331021313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2331021294 and 2331021303.

It is not an unprimeable number, because it can be changed into a prime (2331021323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 426015 + ... + 431451.

It is an arithmetic number, because the mean of its divisors is an integer number (89487728).

Almost surely, 2^2331021321 is an apocalyptic number.

It is an amenable number.

2331021321 is a deficient number, since it is larger than the sum of its proper divisors (1248487799).

2331021321 is an equidigital number, since it uses as much as digits as its factorization.

2331021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595 (or 5586 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2331021321 is about 48280.6516215347. The cubic root of 2331021321 is about 1325.9141802733.

Adding to 2331021321 its reverse (1231201332), we get a palindrome (3562222653).

The spelling of 2331021321 in words is "two billion, three hundred thirty-one million, twenty-one thousand, three hundred twenty-one".