4240343123421 has 8 divisors (see below), whose sum is σ = 5653814827584. Its totient is φ = 2826883417440.

The previous prime is 4240343123407. The next prime is 4240343123447. The reversal of 4240343123421 is 1243213430424.

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

It is not a de Polignac number, because 4240343123421 - 2¹¹ = 4240343121373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240343123221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2139696 + ... + 3613721.

It is an arithmetic number, because the mean of its divisors is an integer number (706726853448).

Almost surely, 2^{4240343123421} is an apocalyptic number.

It is an amenable number.

4240343123421 is a deficient number, since it is larger than the sum of its proper divisors (1413471704163).

4240343123421 is a wasteful number, since it uses less digits than its factorization.

4240343123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999091.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 4240343123421 its reverse (1243213430424), we get a palindrome (5483556553845).

The spelling of 4240343123421 in words is "four trillion, two hundred forty billion, three hundred forty-three million, one hundred twenty-three thousand, four hundred twenty-one".