1232216321 has 8 divisors (see below), whose sum is σ = 1491085440. Its totient is φ = 994056768.

The previous prime is 1232216309. The next prime is 1232216327. The reversal of 1232216321 is 1236122321.

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 1232216321 - 2¹⁰ = 1232215297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1232216327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5177261 + ... + 5177498.

It is an arithmetic number, because the mean of its divisors is an integer number (186385680).

Almost surely, 2^1232216321 is an apocalyptic number.

It is an amenable number.

1232216321 is a deficient number, since it is larger than the sum of its proper divisors (258869119).

1232216321 is a wasteful number, since it uses less digits than its factorization.

1232216321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10354783.

The product of its digits is 864, while the sum is 23.

The square root of 1232216321 is about 35102.9389225461. The cubic root of 1232216321 is about 1072.0844222447.

Adding to 1232216321 its reverse (1236122321), we get a palindrome (2468338642).

The spelling of 1232216321 in words is "one billion, two hundred thirty-two million, two hundred sixteen thousand, three hundred twenty-one".