2121233331321 has 24 divisors (see below), whose sum is σ = 3300338321280. Its totient is φ = 1305120368736.

The previous prime is 2121233331299. The next prime is 2121233331353. The reversal of 2121233331321 is 1231333321212.

2121233331321 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 2 + 3 + 3 + 331 + 321 = 666.

It is not a de Polignac number, because 2121233331321 - 2⁶ = 2121233331257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121233331121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1159041 + ... + 2363438.

It is an arithmetic number, because the mean of its divisors is an integer number (137514096720).

Almost surely, 2^{2121233331321} is an apocalyptic number.

It is an amenable number.

2121233331321 is a deficient number, since it is larger than the sum of its proper divisors (1179104989959).

2121233331321 is a wasteful number, since it uses less digits than its factorization.

2121233331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3527645 (or 3527642 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 2121233331321 its reverse (1231333321212), we get a palindrome (3352566652533).

The spelling of 2121233331321 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-three million, three hundred thirty-one thousand, three hundred twenty-one".