4123323221 has 4 divisors (see below), whose sum is σ = 4126222272. Its totient is φ = 4120424172.

The previous prime is 4123323187. The next prime is 4123323233. The reversal of 4123323221 is 1223233214.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4123323221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4123323271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1447391 + ... + 1450236.

It is an arithmetic number, because the mean of its divisors is an integer number (1031555568).

Almost surely, 2^4123323221 is an apocalyptic number.

It is an amenable number.

4123323221 is a deficient number, since it is larger than the sum of its proper divisors (2899051).

4123323221 is a wasteful number, since it uses less digits than its factorization.

4123323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899050.

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

The square root of 4123323221 is about 64213.1078596886. The cubic root of 4123323221 is about 1603.5498294375.

Adding to 4123323221 its reverse (1223233214), we get a palindrome (5346556435).

The spelling of 4123323221 in words is "four billion, one hundred twenty-three million, three hundred twenty-three thousand, two hundred twenty-one".