440343201421 has 4 divisors (see below), whose sum is σ = 440344530144. Its totient is φ = 440341872700.

The previous prime is 440343201413. The next prime is 440343201443. The reversal of 440343201421 is 124102343044.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 440343201421 - 2³ = 440343201413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440343201421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440343201451) 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, 283986 + ... + 980476.

It is an arithmetic number, because the mean of its divisors is an integer number (110086132536).

Almost surely, 2^440343201421 is an apocalyptic number.

It is an amenable number.

440343201421 is a deficient number, since it is larger than the sum of its proper divisors (1328723).

440343201421 is an equidigital number, since it uses as much as digits as its factorization.

440343201421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328722.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 440343201421 its reverse (124102343044), we get a palindrome (564445544465).

The spelling of 440343201421 in words is "four hundred forty billion, three hundred forty-three million, two hundred one thousand, four hundred twenty-one".