2320321221 has 24 divisors (see below), whose sum is σ = 3478121920. Its totient is φ = 1545806592.

The previous prime is 2320321181. The next prime is 2320321231. The reversal of 2320321221 is 1221230232.

2320321221 is a `hidden beast` number, since 2 + 320 + 321 + 2 + 21 = 666.

It is not a de Polignac number, because 2320321221 - 2⁷ = 2320321093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2320321194 and 2320321203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320321231) 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, 511200 + ... + 515718.

Almost surely, 2^2320321221 is an apocalyptic number.

It is an amenable number.

2320321221 is a deficient number, since it is larger than the sum of its proper divisors (1157800699).

2320321221 is an equidigital number, since it uses as much as digits as its factorization.

2320321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647 (or 6635 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2320321221 is about 48169.7126937664. The cubic root of 2320321221 is about 1323.8822843670.

Adding to 2320321221 its reverse (1221230232), we get a palindrome (3541551453).

The spelling of 2320321221 in words is "two billion, three hundred twenty million, three hundred twenty-one thousand, two hundred twenty-one".