4421603823121 has 27 divisors (see below), whose sum is σ = 4733839858683. Its totient is φ = 4129654383120.

The previous prime is 4421603823103. The next prime is 4421603823139. The reversal of 4421603823121 is 1213283061244.

The square root of 4421603823121 is 2102761.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (4421603823103) and next prime (4421603823139).

It can be written as a sum of positive squares in only one way, i.e., 2318581790721 + 2103022032400 = 1522689^2 + 1450180^2 .

It is not a de Polignac number, because 4421603823121 - 2¹¹ = 4421603821073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4421603823151) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1890380970 + ... + 1890383308.

Almost surely, 2^{4421603823121} is an apocalyptic number.

4421603823121 is the 2102761-st square number.

4421603823121 is the 1051381-st centered octagonal number.

It is an amenable number.

4421603823121 is a deficient number, since it is larger than the sum of its proper divisors (312236035562).

4421603823121 is an frugal number, since it uses more digits than its factorization.

4421603823121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

Adding to 4421603823121 its reverse (1213283061244), we get a palindrome (5634886884365).

The spelling of 4421603823121 in words is "four trillion, four hundred twenty-one billion, six hundred three million, eight hundred twenty-three thousand, one hundred twenty-one".