5206120021 has 8 divisors (see below), whose sum is σ = 5258389400. Its totient is φ = 5153932800.

The previous prime is 5206120019. The next prime is 5206120027. The reversal of 5206120021 is 1200216025.

It can be written as a sum of positive squares in 4 ways, for example, as 34928100 + 5171191921 = 5910^2 + 71911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5206120021 - 2¹ = 5206120019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5206120027) 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 7 ways as a sum of consecutive naturals, for example, 111025 + ... + 150793.

It is an arithmetic number, because the mean of its divisors is an integer number (657298675).

Almost surely, 2^5206120021 is an apocalyptic number.

It is an amenable number.

5206120021 is a deficient number, since it is larger than the sum of its proper divisors (52269379).

5206120021 is a wasteful number, since it uses less digits than its factorization.

5206120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41079.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 5206120021 is about 72153.4477416014. The cubic root of 5206120021 is about 1733.1576110775.

Adding to 5206120021 its reverse (1200216025), we get a palindrome (6406336046).

The spelling of 5206120021 in words is "five billion, two hundred six million, one hundred twenty thousand, twenty-one".