44121021 has 24 divisors (see below), whose sum is σ = 72038880. Its totient is φ = 23883552.

The previous prime is 44121019. The next prime is 44121037. The reversal of 44121021 is 12012144.

It is not a de Polignac number, because 44121021 - 2¹ = 44121019 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 (44121071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5106 + ... + 10691.

It is an arithmetic number, because the mean of its divisors is an integer number (3001620).

Almost surely, 2^44121021 is an apocalyptic number.

It is an amenable number.

44121021 is a deficient number, since it is larger than the sum of its proper divisors (27917859).

44121021 is a wasteful number, since it uses less digits than its factorization.

44121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15833 (or 15826 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 44121021 is about 6642.3656177600. The cubic root of 44121021 is about 353.3582086636.

Adding to 44121021 its reverse (12012144), we get a palindrome (56133165).

The spelling of 44121021 in words is "forty-four million, one hundred twenty-one thousand, twenty-one".