2321311321 has 4 divisors (see below), whose sum is σ = 2652927232. Its totient is φ = 1989695412.

The previous prime is 2321311313. The next prime is 2321311337. The reversal of 2321311321 is 1231131232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2321311321 - 2³ = 2321311313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2321311361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165807945 + ... + 165807958.

It is an arithmetic number, because the mean of its divisors is an integer number (663231808).

Almost surely, 2^2321311321 is an apocalyptic number.

It is an amenable number.

2321311321 is a deficient number, since it is larger than the sum of its proper divisors (331615911).

2321311321 is an equidigital number, since it uses as much as digits as its factorization.

2321311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331615910.

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

The square root of 2321311321 is about 48179.9888024063. The cubic root of 2321311321 is about 1324.0705613812.

Adding to 2321311321 its reverse (1231131232), we get a palindrome (3552442553).

The spelling of 2321311321 in words is "two billion, three hundred twenty-one million, three hundred eleven thousand, three hundred twenty-one".