2121321331 has 8 divisors (see below), whose sum is σ = 2142189504. Its totient is φ = 2100472680.

The previous prime is 2121321317. The next prime is 2121321347. The reversal of 2121321331 is 1331231212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121321331 - 2¹¹ = 2121319283 is a prime.

It is a super-2 number, since 2×2121321331² = 9000008378711223122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121321299 and 2121321308.

It is not an unprimeable number, because it can be changed into a prime (2121321311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313696 + ... + 320386.

It is an arithmetic number, because the mean of its divisors is an integer number (267773688).

Almost surely, 2^2121321331 is an apocalyptic number.

2121321331 is a deficient number, since it is larger than the sum of its proper divisors (20868173).

2121321331 is a wasteful number, since it uses less digits than its factorization.

2121321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761.

The product of its digits is 216, while the sum is 19.

The square root of 2121321331 is about 46057.8042355473. The cubic root of 2121321331 is about 1284.8984927918.

Adding to 2121321331 its reverse (1331231212), we get a palindrome (3452552543).

The spelling of 2121321331 in words is "two billion, one hundred twenty-one million, three hundred twenty-one thousand, three hundred thirty-one".