144240340231021 has 4 divisors (see below), whose sum is σ = 145125250293952. Its totient is φ = 143355430168092.

The previous prime is 144240340231003. The next prime is 144240340231027. The reversal of 144240340231021 is 120132043042441.

It is a happy number.

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 144240340231021 - 2²¹ = 144240338133869 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 (144240340231027) 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, 442455031221 + ... + 442455031546.

It is an arithmetic number, because the mean of its divisors is an integer number (36281312573488).

Almost surely, 2^{144240340231021} is an apocalyptic number.

It is an amenable number.

144240340231021 is a deficient number, since it is larger than the sum of its proper divisors (884910062931).

144240340231021 is an equidigital number, since it uses as much as digits as its factorization.

144240340231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884910062930.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 144240340231021 its reverse (120132043042441), we get a palindrome (264372383273462).

The spelling of 144240340231021 in words is "one hundred forty-four trillion, two hundred forty billion, three hundred forty million, two hundred thirty-one thousand, twenty-one".