2321023221 has 32 divisors (see below), whose sum is σ = 3812672640. Its totient is φ = 1383609600.

The previous prime is 2321023217. The next prime is 2321023249. The reversal of 2321023221 is 1223201232.

It is not a de Polignac number, because 2321023221 - 2² = 2321023217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2321023194 and 2321023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321025221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45940 + ... + 82173.

It is an arithmetic number, because the mean of its divisors is an integer number (119146020).

Almost surely, 2^2321023221 is an apocalyptic number.

It is an amenable number.

2321023221 is a deficient number, since it is larger than the sum of its proper divisors (1491649419).

2321023221 is a wasteful number, since it uses less digits than its factorization.

2321023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128194 (or 128188 counting only the distinct ones).

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

The square root of 2321023221 is about 48176.9988791332. The cubic root of 2321023221 is about 1324.0157819256.

Adding to 2321023221 its reverse (1223201232), we get a palindrome (3544224453).

The spelling of 2321023221 in words is "two billion, three hundred twenty-one million, twenty-three thousand, two hundred twenty-one".