1232343221 has 4 divisors (see below), whose sum is σ = 1239228000. Its totient is φ = 1225458444.

The previous prime is 1232343187. The next prime is 1232343239. The reversal of 1232343221 is 1223432321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1223432321 = 751 ⋅1629071.

It is a cyclic number.

It is not a de Polignac number, because 1232343221 - 2⁶ = 1232343157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232343241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3442121 + ... + 3442478.

It is an arithmetic number, because the mean of its divisors is an integer number (309807000).

Almost surely, 2^1232343221 is an apocalyptic number.

It is an amenable number.

1232343221 is a deficient number, since it is larger than the sum of its proper divisors (6884779).

1232343221 is an equidigital number, since it uses as much as digits as its factorization.

1232343221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884778.

The product of its digits is 1728, while the sum is 23.

The square root of 1232343221 is about 35104.7464169733. The cubic root of 1232343221 is about 1072.1212239114.

Adding to 1232343221 its reverse (1223432321), we get a palindrome (2455775542).

The spelling of 1232343221 in words is "one billion, two hundred thirty-two million, three hundred forty-three thousand, two hundred twenty-one".