2321231221 has 8 divisors (see below), whose sum is σ = 2458257984. Its totient is φ = 2184258240.

The previous prime is 2321231219. The next prime is 2321231233. The reversal of 2321231221 is 1221321232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2321231221 - 2¹ = 2321231219 is a prime.

It is a super-2 number, since 2×2321231221² = 10776228762690301682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321231251) 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 7 ways as a sum of consecutive naturals, for example, 105616 + ... + 125686.

It is an arithmetic number, because the mean of its divisors is an integer number (307282248).

Almost surely, 2^2321231221 is an apocalyptic number.

It is an amenable number.

2321231221 is a deficient number, since it is larger than the sum of its proper divisors (137026763).

2321231221 is a wasteful number, since it uses less digits than its factorization.

2321231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26891.

The product of its digits is 288, while the sum is 19.

The square root of 2321231221 is about 48179.1575372588. The cubic root of 2321231221 is about 1324.0553315883.

Adding to 2321231221 its reverse (1221321232), we get a palindrome (3542552453).

The spelling of 2321231221 in words is "two billion, three hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-one".