4123340021 has 8 divisors (see below), whose sum is σ = 4439888640. Its totient is φ = 3815013568.

The previous prime is 4123340003. The next prime is 4123340077. The reversal of 4123340021 is 1200433214.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4123340021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4123339975 and 4123340002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4123300021) 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 7 ways as a sum of consecutive naturals, for example, 2054501 + ... + 2056506.

It is an arithmetic number, because the mean of its divisors is an integer number (554986080).

Almost surely, 2^4123340021 is an apocalyptic number.

It is an amenable number.

4123340021 is a deficient number, since it is larger than the sum of its proper divisors (316548619).

4123340021 is a wasteful number, since it uses less digits than its factorization.

4123340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111083.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4123340021 is about 64213.2386739682. The cubic root of 4123340021 is about 1603.5520072602.

Adding to 4123340021 its reverse (1200433214), we get a palindrome (5323773235).

It can be divided in two parts, 412 and 3340021, that added together give a palindrome (3340433).

The spelling of 4123340021 in words is "four billion, one hundred twenty-three million, three hundred forty thousand, twenty-one".