4520203121 has 4 divisors (see below), whose sum is σ = 5165946432. Its totient is φ = 3874459812.

The previous prime is 4520203109. The next prime is 4520203139. The reversal of 4520203121 is 1213020254.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4520203121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4520203093 and 4520203102.

It is not an unprimeable number, because it can be changed into a prime (4520203141) 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, 322871645 + ... + 322871658.

It is an arithmetic number, because the mean of its divisors is an integer number (1291486608).

Almost surely, 2^4520203121 is an apocalyptic number.

It is an amenable number.

4520203121 is a deficient number, since it is larger than the sum of its proper divisors (645743311).

4520203121 is an equidigital number, since it uses as much as digits as its factorization.

4520203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645743310.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 4520203121 is about 67232.4558602465. The cubic root of 4520203121 is about 1653.4306485880.

Adding to 4520203121 its reverse (1213020254), we get a palindrome (5733223375).

The spelling of 4520203121 in words is "four billion, five hundred twenty million, two hundred three thousand, one hundred twenty-one".