2320031221 has 4 divisors (see below), whose sum is σ = 2321371692. Its totient is φ = 2318690752.

The previous prime is 2320031209. The next prime is 2320031251. The reversal of 2320031221 is 1221300232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1857179025 + 462852196 = 43095^2 + 21514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2320031221 - 2¹⁹ = 2319506933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2320031195 and 2320031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320031201) 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 3 ways as a sum of consecutive naturals, for example, 667636 + ... + 671101.

It is an arithmetic number, because the mean of its divisors is an integer number (580342923).

Almost surely, 2^2320031221 is an apocalyptic number.

It is an amenable number.

2320031221 is a deficient number, since it is larger than the sum of its proper divisors (1340471).

2320031221 is a wasteful number, since it uses less digits than its factorization.

2320031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340470.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2320031221 is about 48166.7024094446. The cubic root of 2320031221 is about 1323.8271279437.

Adding to 2320031221 its reverse (1221300232), we get a palindrome (3541331453).

The spelling of 2320031221 in words is "two billion, three hundred twenty million, thirty-one thousand, two hundred twenty-one".