5021200721 has 4 divisors (see below), whose sum is σ = 5028962112. Its totient is φ = 5013439332.

The previous prime is 5021200703. The next prime is 5021200747. The reversal of 5021200721 is 1270021205.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1270021205 = 5 ⋅254004241.

It is a cyclic number.

It is not a de Polignac number, because 5021200721 - 2¹⁰ = 5021199697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5021200693 and 5021200702.

It is not an unprimeable number, because it can be changed into a prime (5021200781) 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, 3879725 + ... + 3881018.

It is an arithmetic number, because the mean of its divisors is an integer number (1257240528).

Almost surely, 2^5021200721 is an apocalyptic number.

It is an amenable number.

5021200721 is a deficient number, since it is larger than the sum of its proper divisors (7761391).

5021200721 is an equidigital number, since it uses as much as digits as its factorization.

5021200721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7761390.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 5021200721 is about 70860.4312786763. The cubic root of 5021200721 is about 1712.3893869699.

Adding to 5021200721 its reverse (1270021205), we get a palindrome (6291221926).

The spelling of 5021200721 in words is "five billion, twenty-one million, two hundred thousand, seven hundred twenty-one".