144221002321021 has 4 divisors (see below), whose sum is σ = 144221138725500. Its totient is φ = 144220865916544.

The previous prime is 144221002321007. The next prime is 144221002321031. The reversal of 144221002321021 is 120123200122441.

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 10973550643225 + 133247451677796 = 3312635^2 + 11543286^2 .

It is a cyclic number.

It is not a de Polignac number, because 144221002321021 - 2⁹ = 144221002320509 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 (144221002321031) 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, 66603796 + ... + 68735053.

It is an arithmetic number, because the mean of its divisors is an integer number (36055284681375).

Almost surely, 2^{144221002321021} is an apocalyptic number.

It is an amenable number.

144221002321021 is a deficient number, since it is larger than the sum of its proper divisors (136404479).

144221002321021 is a wasteful number, since it uses less digits than its factorization.

144221002321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136404478.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 144221002321021 its reverse (120123200122441), we get a palindrome (264344202443462).

The spelling of 144221002321021 in words is "one hundred forty-four trillion, two hundred twenty-one billion, two million, three hundred twenty-one thousand, twenty-one".