1440203021121 has 4 divisors (see below), whose sum is σ = 1920270694832. Its totient is φ = 960135347412.

The previous prime is 1440203021083. The next prime is 1440203021167. The reversal of 1440203021121 is 1211203020441.

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 not a de Polignac number, because 1440203021121 - 2⁹ = 1440203020609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440203029121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240033836851 + ... + 240033836856.

It is an arithmetic number, because the mean of its divisors is an integer number (480067673708).

Almost surely, 2^{1440203021121} is an apocalyptic number.

It is an amenable number.

1440203021121 is a deficient number, since it is larger than the sum of its proper divisors (480067673711).

1440203021121 is an equidigital number, since it uses as much as digits as its factorization.

1440203021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480067673710.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1440203021121 its reverse (1211203020441), we get a palindrome (2651406041562).

The spelling of 1440203021121 in words is "one trillion, four hundred forty billion, two hundred three million, twenty-one thousand, one hundred twenty-one".