2121323331 has 8 divisors (see below), whose sum is σ = 2904875344. Its totient is φ = 1375993440.

The previous prime is 2121323293. The next prime is 2121323363. The reversal of 2121323331 is 1333231212.

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

It is a de Polignac number, because none of the positive numbers 2^k-2121323331 is a prime.

It is a super-2 number, since 2×2121323331² = 9000025349289871122, 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 = 2121323298 and 2121323307.

It is not an unprimeable number, because it can be changed into a prime (2121323371) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9555400 + ... + 9555621.

It is an arithmetic number, because the mean of its divisors is an integer number (363109418).

Almost surely, 2^2121323331 is an apocalyptic number.

2121323331 is a deficient number, since it is larger than the sum of its proper divisors (783552013).

2121323331 is a wasteful number, since it uses less digits than its factorization.

2121323331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111061.

The product of its digits is 648, while the sum is 21.

The square root of 2121323331 is about 46057.8259473892. The cubic root of 2121323331 is about 1284.8988965961.

Adding to 2121323331 its reverse (1333231212), we get a palindrome (3454554543).

It can be divided in two parts, 21213 and 23331, that added together give a palindrome (44544).

The spelling of 2121323331 in words is "two billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred thirty-one".