1440001220421 has 8 divisors (see below), whose sum is σ = 1920195156960. Its totient is φ = 959904048752.

The previous prime is 1440001220387. The next prime is 1440001220459. The reversal of 1440001220421 is 1240221000441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1440001220421 - 2¹⁹ = 1440000696133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440001227421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24156486 + ... + 24216023.

It is an arithmetic number, because the mean of its divisors is an integer number (240024394620).

Almost surely, 2^{1440001220421} is an apocalyptic number.

It is an amenable number.

1440001220421 is a deficient number, since it is larger than the sum of its proper divisors (480193936539).

1440001220421 is an equidigital number, since it uses as much as digits as its factorization.

1440001220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48382435.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1440001220421 its reverse (1240221000441), we get a palindrome (2680222220862).

The spelling of 1440001220421 in words is "one trillion, four hundred forty billion, one million, two hundred twenty thousand, four hundred twenty-one".