4123343021 has 4 divisors (see below), whose sum is σ = 4712392032. Its totient is φ = 3534294012.

The previous prime is 4123342997. The next prime is 4123343039. The reversal of 4123343021 is 1203433214.

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 not a de Polignac number, because 4123343021 - 2¹⁴ = 4123326637 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 (4123343321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294524495 + ... + 294524508.

It is an arithmetic number, because the mean of its divisors is an integer number (1178098008).

Almost surely, 2^4123343021 is an apocalyptic number.

It is an amenable number.

4123343021 is a deficient number, since it is larger than the sum of its proper divisors (589049011).

4123343021 is an equidigital number, since it uses as much as digits as its factorization.

4123343021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589049010.

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

The square root of 4123343021 is about 64213.2620336329. The cubic root of 4123343021 is about 1603.5523961565.

Adding to 4123343021 its reverse (1203433214), we get a palindrome (5326776235).

It can be divided in two parts, 412 and 3343021, that added together give a palindrome (3343433).

The spelling of 4123343021 in words is "four billion, one hundred twenty-three million, three hundred forty-three thousand, twenty-one".