4243440133021 has 4 divisors (see below), whose sum is σ = 4315362847200. Its totient is φ = 4171517418844.

The previous prime is 4243440133003. The next prime is 4243440133057. The reversal of 4243440133021 is 1203310443424.

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 4243440133021 - 2⁹ = 4243440132509 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 (4243440133421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35961357001 + ... + 35961357118.

It is an arithmetic number, because the mean of its divisors is an integer number (1078840711800).

Almost surely, 2^{4243440133021} is an apocalyptic number.

It is an amenable number.

4243440133021 is a deficient number, since it is larger than the sum of its proper divisors (71922714179).

4243440133021 is an equidigital number, since it uses as much as digits as its factorization.

4243440133021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71922714178.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 4243440133021 its reverse (1203310443424), we get a palindrome (5446750576445).

The spelling of 4243440133021 in words is "four trillion, two hundred forty-three billion, four hundred forty million, one hundred thirty-three thousand, twenty-one".