244334220021 has 6 divisors (see below), whose sum is σ = 352927206710. Its totient is φ = 162889480008.

The previous prime is 244334220017. The next prime is 244334220059. The reversal of 244334220021 is 120022433442.

244334220021 is a `hidden beast` number, since 2 + 4 + 433 + 4 + 2 + 200 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 243951039396 + 383180625 = 493914^2 + 19575^2 .

It is not a de Polignac number, because 244334220021 - 2² = 244334220017 is a prime.

It is a super-2 number, since 2×244334220021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244334220071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13574123326 + ... + 13574123343.

Almost surely, 2^244334220021 is an apocalyptic number.

It is an amenable number.

244334220021 is a deficient number, since it is larger than the sum of its proper divisors (108592986689).

244334220021 is a wasteful number, since it uses less digits than its factorization.

244334220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27148246675 (or 27148246672 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 244334220021 its reverse (120022433442), we get a palindrome (364356653463).

The spelling of 244334220021 in words is "two hundred forty-four billion, three hundred thirty-four million, two hundred twenty thousand, twenty-one".