44142220121 has 2 divisors, whose sum is σ = 44142220122. Its totient is φ = 44142220120.

The previous prime is 44142220097. The next prime is 44142220127. The reversal of 44142220121 is 12102224144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43917070096 + 225150025 = 209564^2 + 15005^2 .

It is a cyclic number.

It is not a de Polignac number, because 44142220121 - 2²² = 44138025817 is a prime.

It is not a weakly prime, because it can be changed into another prime (44142220127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22071110060 + 22071110061.

It is an arithmetic number, because the mean of its divisors is an integer number (22071110061).

Almost surely, 2^44142220121 is an apocalyptic number.

It is an amenable number.

44142220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

44142220121 is an equidigital number, since it uses as much as digits as its factorization.

44142220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 44142220121 its reverse (12102224144), we get a palindrome (56244444265).

The spelling of 44142220121 in words is "forty-four billion, one hundred forty-two million, two hundred twenty thousand, one hundred twenty-one".