12232421 has 2 divisors, whose sum is σ = 12232422. Its totient is φ = 12232420.

The previous prime is 12232397. The next prime is 12232433. The reversal of 12232421 is 12423221.

12232421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7562500 + 4669921 = 2750^2 + 2161^2 .

It is a cyclic number.

It is not a de Polignac number, because 12232421 - 2⁶ = 12232357 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12232421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12232471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6116210 + 6116211.

It is an arithmetic number, because the mean of its divisors is an integer number (6116211).

Almost surely, 2^12232421 is an apocalyptic number.

It is an amenable number.

12232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12232421 is an equidigital number, since it uses as much as digits as its factorization.

12232421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 17.

The square root of 12232421 is about 3497.4878127021. The cubic root of 12232421 is about 230.4114939791.

Adding to 12232421 its reverse (12423221), we get a palindrome (24655642).

The spelling of 12232421 in words is "twelve million, two hundred thirty-two thousand, four hundred twenty-one".