12232021 has 4 divisors (see below), whose sum is σ = 12763872. Its totient is φ = 11700172.

The previous prime is 12232019. The next prime is 12232039. The reversal of 12232021 is 12023221.

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: 12023221 = 7 ⋅1717603.

It is a cyclic number.

It is not a de Polignac number, because 12232021 - 2¹ = 12232019 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 12231992 and 12232010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232001) 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, 265891 + ... + 265936.

It is an arithmetic number, because the mean of its divisors is an integer number (3190968).

Almost surely, 2^12232021 is an apocalyptic number.

It is an amenable number.

12232021 is a deficient number, since it is larger than the sum of its proper divisors (531851).

12232021 is an equidigital number, since it uses as much as digits as its factorization.

12232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531850.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12232021 is about 3497.4306283327. The cubic root of 12232021 is about 230.4089824675.

Adding to 12232021 its reverse (12023221), we get a palindrome (24255242).

The spelling of 12232021 in words is "twelve million, two hundred thirty-two thousand, twenty-one".