440021413232421 has 8 divisors (see below), whose sum is σ = 586700651394144. Its totient is φ = 293344891946160.

The previous prime is 440021413232413. The next prime is 440021413232519. The reversal of 440021413232421 is 124232314120044.

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

It is not a de Polignac number, because 440021413232421 - 2³ = 440021413232413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440021413232021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678840931 + ... + 679488816.

It is an arithmetic number, because the mean of its divisors is an integer number (73337581424268).

Almost surely, 2^{440021413232421} is an apocalyptic number.

It is an amenable number.

440021413232421 is a deficient number, since it is larger than the sum of its proper divisors (146679238161723).

440021413232421 is a wasteful number, since it uses less digits than its factorization.

440021413232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358437731.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 440021413232421 its reverse (124232314120044), we get a palindrome (564253727352465).

The spelling of 440021413232421 in words is "four hundred forty trillion, twenty-one billion, four hundred thirteen million, two hundred thirty-two thousand, four hundred twenty-one".