5021001021 has 4 divisors (see below), whose sum is σ = 6694668032. Its totient is φ = 3347334012.

The previous prime is 5021001019. The next prime is 5021001031. The reversal of 5021001021 is 1201001205.

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 not a de Polignac number, because 5021001021 - 2¹ = 5021001019 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 = 5021000988 and 5021001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5021001031) 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, 836833501 + ... + 836833506.

It is an arithmetic number, because the mean of its divisors is an integer number (1673667008).

Almost surely, 2^5021001021 is an apocalyptic number.

It is an amenable number.

5021001021 is a deficient number, since it is larger than the sum of its proper divisors (1673667011).

5021001021 is a wasteful number, since it uses less digits than its factorization.

5021001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673667010.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 5021001021 is about 70859.0221566739. The cubic root of 5021001021 is about 1712.3666853152.

Adding to 5021001021 its reverse (1201001205), we get a palindrome (6222002226).

The spelling of 5021001021 in words is "five billion, twenty-one million, one thousand, twenty-one".