4123230421 has 2 divisors, whose sum is σ = 4123230422. Its totient is φ = 4123230420.

The previous prime is 4123230379. The next prime is 4123230437. The reversal of 4123230421 is 1240323214.

4123230421 is digitally balanced in base 2, 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., 3791480625 + 331749796 = 61575^2 + 18214^2 .

It is a cyclic number.

It is not a de Polignac number, because 4123230421 - 2²⁹ = 3586359509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4123230392 and 4123230401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4123230491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2061615210 + 2061615211.

It is an arithmetic number, because the mean of its divisors is an integer number (2061615211).

Almost surely, 2^4123230421 is an apocalyptic number.

It is an amenable number.

4123230421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4123230421 is an equidigital number, since it uses as much as digits as its factorization.

4123230421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 4123230421 is about 64212.3852617235. The cubic root of 4123230421 is about 1603.5377994532.

Adding to 4123230421 its reverse (1240323214), we get a palindrome (5363553635).

The spelling of 4123230421 in words is "four billion, one hundred twenty-three million, two hundred thirty thousand, four hundred twenty-one".