5200020121 has 4 divisors (see below), whose sum is σ = 5202451044. Its totient is φ = 5197589200.

The previous prime is 5200020097. The next prime is 5200020151. The reversal of 5200020121 is 1210200025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4787117721 + 412902400 = 69189^2 + 20320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5200020121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5200020151) 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, 1212250 + ... + 1216531.

It is an arithmetic number, because the mean of its divisors is an integer number (1300612761).

Almost surely, 2^5200020121 is an apocalyptic number.

It is an amenable number.

5200020121 is a deficient number, since it is larger than the sum of its proper divisors (2430923).

5200020121 is a wasteful number, since it uses less digits than its factorization.

5200020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430922.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 5200020121 is about 72111.1650231779. The cubic root of 5200020121 is about 1732.4804452426.

Adding to 5200020121 its reverse (1210200025), we get a palindrome (6410220146).

The spelling of 5200020121 in words is "five billion, two hundred million, twenty thousand, one hundred twenty-one".