144243443221 has 4 divisors (see below), whose sum is σ = 144244918944. Its totient is φ = 144241967500.

The previous prime is 144243443101. The next prime is 144243443299. The reversal of 144243443221 is 122344342441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144243443221 - 2³³ = 135653508629 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 (144243443321) 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, 579985 + ... + 790486.

It is an arithmetic number, because the mean of its divisors is an integer number (36061229736).

Almost surely, 2^144243443221 is an apocalyptic number.

It is an amenable number.

144243443221 is a deficient number, since it is larger than the sum of its proper divisors (1475723).

144243443221 is a wasteful number, since it uses less digits than its factorization.

144243443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475722.

The product of its digits is 73728, while the sum is 34.

Adding to 144243443221 its reverse (122344342441), we get a palindrome (266587785662).

The spelling of 144243443221 in words is "one hundred forty-four billion, two hundred forty-three million, four hundred forty-three thousand, two hundred twenty-one".