2206600021 has 4 divisors (see below), whose sum is σ = 2206786432. Its totient is φ = 2206413612.

The previous prime is 2206600009. The next prime is 2206600037. The reversal of 2206600021 is 1200066022.

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 2206600021 - 2²¹ = 2204502869 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 (2206600061) 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, 74151 + ... + 99556.

It is an arithmetic number, because the mean of its divisors is an integer number (551696608).

Almost surely, 2^2206600021 is an apocalyptic number.

It is an amenable number.

2206600021 is a deficient number, since it is larger than the sum of its proper divisors (186411).

2206600021 is a wasteful number, since it uses less digits than its factorization.

2206600021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186410.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2206600021 is about 46974.4613699827. The cubic root of 2206600021 is about 1301.8907440001.

Adding to 2206600021 its reverse (1200066022), we get a palindrome (3406666043).

The spelling of 2206600021 in words is "two billion, two hundred six million, six hundred thousand, twenty-one".