5021021 has 4 divisors (see below), whose sum is σ = 5030844. Its totient is φ = 5011200.

The previous prime is 5020999. The next prime is 5021033. The reversal of 5021021 is 1201205.

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 3367225 + 1653796 = 1835^2 + 1286^2 .

It is a cyclic number.

It is not a de Polignac number, because 5021021 - 2⁶ = 5020957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5020993 and 5021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5021221) 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, 4100 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (1257711).

Almost surely, 2^5021021 is an apocalyptic number.

It is an amenable number.

5021021 is a deficient number, since it is larger than the sum of its proper divisors (9823).

5021021 is an equidigital number, since it uses as much as digits as its factorization.

5021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 5021021 is about 2240.7634859574. The cubic root of 5021021 is about 171.2368956531.

Adding to 5021021 its reverse (1201205), we get a palindrome (6222226).

The spelling of 5021021 in words is "five million, twenty-one thousand, twenty-one".