2120344321 has 4 divisors (see below), whose sum is σ = 2132190000. Its totient is φ = 2108498644.

The previous prime is 2120344267. The next prime is 2120344333. The reversal of 2120344321 is 1234430212.

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 2120344321 - 2⁹ = 2120343809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120344292 and 2120344301.

It is not an unprimeable number, because it can be changed into a prime (2120342321) 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, 5922571 + ... + 5922928.

It is an arithmetic number, because the mean of its divisors is an integer number (533047500).

Almost surely, 2^2120344321 is an apocalyptic number.

It is an amenable number.

2120344321 is a deficient number, since it is larger than the sum of its proper divisors (11845679).

2120344321 is a wasteful number, since it uses less digits than its factorization.

2120344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11845678.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2120344321 is about 46047.1966682012. The cubic root of 2120344321 is about 1284.7012020069.

Adding to 2120344321 its reverse (1234430212), we get a palindrome (3354774533).

The spelling of 2120344321 in words is "two billion, one hundred twenty million, three hundred forty-four thousand, three hundred twenty-one".