144424132421 has 4 divisors (see below), whose sum is σ = 144837955500. Its totient is φ = 144010309344.

The previous prime is 144424132403. The next prime is 144424132439. The reversal of 144424132421 is 124231424441.

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

It is an interprime number because it is at equal distance from previous prime (144424132403) and next prime (144424132439).

It can be written as a sum of positive squares in 2 ways, for example, as 53527912321 + 90896220100 = 231361^2 + 301490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144424132421 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 (144424132441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206911016 + ... + 206911713.

It is an arithmetic number, because the mean of its divisors is an integer number (36209488875).

Almost surely, 2^144424132421 is an apocalyptic number.

It is an amenable number.

144424132421 is a deficient number, since it is larger than the sum of its proper divisors (413823079).

144424132421 is an equidigital number, since it uses as much as digits as its factorization.

144424132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413823078.

The product of its digits is 24576, while the sum is 32.

Adding to 144424132421 its reverse (124231424441), we get a palindrome (268655556862).

The spelling of 144424132421 in words is "one hundred forty-four billion, four hundred twenty-four million, one hundred thirty-two thousand, four hundred twenty-one".