44021421421 has 16 divisors (see below), whose sum is σ = 46420335360. Its totient is φ = 41681989440.

The previous prime is 44021421403. The next prime is 44021421449. The reversal of 44021421421 is 12412412044.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 44021421421 - 2⁷ = 44021421293 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 (44021421401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4099966 + ... + 4110688.

It is an arithmetic number, because the mean of its divisors is an integer number (2901270960).

Almost surely, 2^44021421421 is an apocalyptic number.

It is an amenable number.

44021421421 is a deficient number, since it is larger than the sum of its proper divisors (2398913939).

44021421421 is a wasteful number, since it uses less digits than its factorization.

44021421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13476.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 44021421421 its reverse (12412412044), we get a palindrome (56433833465).

The spelling of 44021421421 in words is "forty-four billion, twenty-one million, four hundred twenty-one thousand, four hundred twenty-one".