144040244120021 has 4 divisors (see below), whose sum is σ = 144227552630700. Its totient is φ = 143852935609344.

The previous prime is 144040244119999. The next prime is 144040244120023. The reversal of 144040244120021 is 120021442040441.

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 50910294171025 + 93129949948996 = 7135145^2 + 9650386^2 .

It is a cyclic number.

It is not a de Polignac number, because 144040244120021 - 2³⁴ = 144023064250837 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 (144040244120023) 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, 93654254186 + ... + 93654255723.

It is an arithmetic number, because the mean of its divisors is an integer number (36056888157675).

Almost surely, 2^{144040244120021} is an apocalyptic number.

It is an amenable number.

144040244120021 is a deficient number, since it is larger than the sum of its proper divisors (187308510679).

144040244120021 is an equidigital number, since it uses as much as digits as its factorization.

144040244120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187308510678.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 144040244120021 its reverse (120021442040441), we get a palindrome (264061686160462).

The spelling of 144040244120021 in words is "one hundred forty-four trillion, forty billion, two hundred forty-four million, one hundred twenty thousand, twenty-one".