5020221521 has 4 divisors (see below), whose sum is σ = 5737396032. Its totient is φ = 4303047012.

The previous prime is 5020221497. The next prime is 5020221539. The reversal of 5020221521 is 1251220205.

It is a happy number.

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 not a de Polignac number, because 5020221521 - 2²² = 5016027217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5020221493 and 5020221502.

It is not an unprimeable number, because it can be changed into a prime (5020221541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358587245 + ... + 358587258.

It is an arithmetic number, because the mean of its divisors is an integer number (1434349008).

Almost surely, 2^5020221521 is an apocalyptic number.

It is an amenable number.

5020221521 is a deficient number, since it is larger than the sum of its proper divisors (717174511).

5020221521 is an equidigital number, since it uses as much as digits as its factorization.

5020221521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717174510.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 5020221521 is about 70853.5215850278. The cubic root of 5020221521 is about 1712.2780669364.

Adding to 5020221521 its reverse (1251220205), we get a palindrome (6271441726).

The spelling of 5020221521 in words is "five billion, twenty million, two hundred twenty-one thousand, five hundred twenty-one".