2133121321 has 8 divisors (see below), whose sum is σ = 2142137088. Its totient is φ = 2124120000.

The previous prime is 2133121307. The next prime is 2133121327. The reversal of 2133121321 is 1231213312.

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 2133121321 - 2¹⁵ = 2133088553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2133121327) 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, 370656 + ... + 376366.

It is an arithmetic number, because the mean of its divisors is an integer number (267767136).

Almost surely, 2^2133121321 is an apocalyptic number.

It is an amenable number.

2133121321 is a deficient number, since it is larger than the sum of its proper divisors (9015767).

2133121321 is a wasteful number, since it uses less digits than its factorization.

2133121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7223.

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

The square root of 2133121321 is about 46185.7263773127. The cubic root of 2133121321 is about 1287.2765331328.

Adding to 2133121321 its reverse (1231213312), we get a palindrome (3364334633).

The spelling of 2133121321 in words is "two billion, one hundred thirty-three million, one hundred twenty-one thousand, three hundred twenty-one".