144442220401421 has 8 divisors (see below), whose sum is σ = 148471674794904. Its totient is φ = 140419377092160.

The previous prime is 144442220401417. The next prime is 144442220401459. The reversal of 144442220401421 is 124104022244441.

144442220401421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 49641113466025 + 94801106935396 = 7045645^2 + 9736586^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144442220401421 - 2² = 144442220401417 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 (144442220481421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652726750 + ... + 1652814143.

It is an arithmetic number, because the mean of its divisors is an integer number (18558959349363).

Almost surely, 2^{144442220401421} is an apocalyptic number.

It is an amenable number.

144442220401421 is a deficient number, since it is larger than the sum of its proper divisors (4029454393483).

144442220401421 is a wasteful number, since it uses less digits than its factorization.

144442220401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305542111.

The product of its (nonzero) digits is 65536, while the sum is 35.

Adding to 144442220401421 its reverse (124104022244441), we get a palindrome (268546242645862).

The spelling of 144442220401421 in words is "one hundred forty-four trillion, four hundred forty-two billion, two hundred twenty million, four hundred one thousand, four hundred twenty-one".