4144445121 has 4 divisors (see below), whose sum is σ = 5525926832. Its totient is φ = 2762963412.

The previous prime is 4144445099. The next prime is 4144445143. The reversal of 4144445121 is 1215444414.

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.

It is an interprime number because it is at equal distance from previous prime (4144445099) and next prime (4144445143).

It is not a de Polignac number, because 4144445121 - 2⁵ = 4144445089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4144445161) 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 in 3 ways as a sum of consecutive naturals, for example, 690740851 + ... + 690740856.

It is an arithmetic number, because the mean of its divisors is an integer number (1381481708).

Almost surely, 2^4144445121 is an apocalyptic number.

It is an amenable number.

4144445121 is a deficient number, since it is larger than the sum of its proper divisors (1381481711).

4144445121 is a wasteful number, since it uses less digits than its factorization.

4144445121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381481710.

The product of its digits is 10240, while the sum is 30.

The square root of 4144445121 is about 64377.3649740342. The cubic root of 4144445121 is about 1606.2832516324.

Adding to 4144445121 its reverse (1215444414), we get a palindrome (5359889535).

The spelling of 4144445121 in words is "four billion, one hundred forty-four million, four hundred forty-five thousand, one hundred twenty-one".