4244001320021 has 4 divisors (see below), whose sum is σ = 4244097728844. Its totient is φ = 4243904911200.

The previous prime is 4244001319993. The next prime is 4244001320071. The reversal of 4244001320021 is 1200231004424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3383800719121 + 860200600900 = 1839511^2 + 927470^2 .

It is a cyclic number.

It is not a de Polignac number, because 4244001320021 - 2²⁶ = 4243934211157 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 (4244001320071) 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, 48138350 + ... + 48226431.

It is an arithmetic number, because the mean of its divisors is an integer number (1061024432211).

Almost surely, 2^{4244001320021} is an apocalyptic number.

It is an amenable number.

4244001320021 is a deficient number, since it is larger than the sum of its proper divisors (96408823).

4244001320021 is an equidigital number, since it uses as much as digits as its factorization.

4244001320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96408822.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 4244001320021 its reverse (1200231004424), we get a palindrome (5444232324445).

The spelling of 4244001320021 in words is "four trillion, two hundred forty-four billion, one million, three hundred twenty thousand, twenty-one".