3121321 has 8 divisors (see below), whose sum is σ = 3592064. Its totient is φ = 2656800.

The previous prime is 3121303. The next prime is 3121333. The reversal of 3121321 is 1231213.

3121321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3121321 - 2⁷ = 3121193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3121361) 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 7 ways as a sum of consecutive naturals, for example, 420 + ... + 2533.

It is an arithmetic number, because the mean of its divisors is an integer number (449008).

Almost surely, 2^3121321 is an apocalyptic number.

It is an amenable number.

3121321 is a deficient number, since it is larger than the sum of its proper divisors (470743).

3121321 is a wasteful number, since it uses less digits than its factorization.

3121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111.

The product of its digits is 36, while the sum is 13.

The square root of 3121321 is about 1766.7260681837. The cubic root of 3121321 is about 146.1434912544.

Adding to 3121321 its reverse (1231213), we get a palindrome (4352534).

The spelling of 3121321 in words is "three million, one hundred twenty-one thousand, three hundred twenty-one".