144220021000021 has 4 divisors (see below), whose sum is σ = 144225501135052. Its totient is φ = 144214540864992.

The previous prime is 144220020999997. The next prime is 144220021000051. The reversal of 144220021000021 is 120000120022441.

144220021000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 110562491116900 + 33657529883121 = 10514870^2 + 5801511^2 .

It is a cyclic number.

It is not a de Polignac number, because 144220021000021 - 2¹³ = 144220020991829 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 (144220021000051) 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, 2740028040 + ... + 2740080673.

It is an arithmetic number, because the mean of its divisors is an integer number (36056375283763).

Almost surely, 2^{144220021000021} is an apocalyptic number.

It is an amenable number.

144220021000021 is a deficient number, since it is larger than the sum of its proper divisors (5480135031).

144220021000021 is an equidigital number, since it uses as much as digits as its factorization.

144220021000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480135030.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 144220021000021 its reverse (120000120022441), we get a palindrome (264220141022462).

The spelling of 144220021000021 in words is "one hundred forty-four trillion, two hundred twenty billion, twenty-one million, twenty-one", and thus it is an aban number.