4243004212421 has 8 divisors (see below), whose sum is σ = 4569601814904. Its totient is φ = 3916436990400.

The previous prime is 4243004212417. The next prime is 4243004212463. The reversal of 4243004212421 is 1242124003424.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 69098008225 + 4173906204196 = 262865^2 + 2043014^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4243004212421 - 2² = 4243004212417 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 (4243004218421) 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, 7304630 + ... + 7864071.

It is an arithmetic number, because the mean of its divisors is an integer number (571200226863).

Almost surely, 2^{4243004212421} is an apocalyptic number.

It is an amenable number.

4243004212421 is a deficient number, since it is larger than the sum of its proper divisors (326597602483).

4243004212421 is a wasteful number, since it uses less digits than its factorization.

4243004212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15190231.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 4243004212421 its reverse (1242124003424), we get a palindrome (5485128215845).

The spelling of 4243004212421 in words is "four trillion, two hundred forty-three billion, four million, two hundred twelve thousand, four hundred twenty-one".