4144031021 has 4 divisors (see below), whose sum is σ = 4462802652. Its totient is φ = 3825259392.

The previous prime is 4144031011. The next prime is 4144031039. The reversal of 4144031021 is 1201304414.

4144031021 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1201304414 = 2 ⋅600652207.

It can be written as a sum of positive squares in 2 ways, for example, as 2708682025 + 1435348996 = 52045^2 + 37886^2 .

It is a cyclic number.

It is not a de Polignac number, because 4144031021 - 2¹⁸ = 4143768877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4144030984 and 4144031002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4144031011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159385796 + ... + 159385821.

It is an arithmetic number, because the mean of its divisors is an integer number (1115700663).

Almost surely, 2^4144031021 is an apocalyptic number.

It is an amenable number.

4144031021 is a deficient number, since it is larger than the sum of its proper divisors (318771631).

4144031021 is a wasteful number, since it uses less digits than its factorization.

4144031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318771630.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4144031021 is about 64374.1487011673. The cubic root of 4144031021 is about 1606.2297515835.

Adding to 4144031021 its reverse (1201304414), we get a palindrome (5345335435).

The spelling of 4144031021 in words is "four billion, one hundred forty-four million, thirty-one thousand, twenty-one".