2006003222721 has 6 divisors (see below), whose sum is σ = 2897560210610. Its totient is φ = 1337335481808.

The previous prime is 2006003222693. The next prime is 2006003222761. The reversal of 2006003222721 is 1272223006002.

2006003222721 is a `hidden beast` number, since 2 + 0 + 0 + 600 + 32 + 2 + 2 + 7 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1999240463025 + 6762759696 = 1413945^2 + 82236^2 .

It is not a de Polignac number, because 2006003222721 - 2¹¹ = 2006003220673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2006003222761) 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 5 ways as a sum of consecutive naturals, for example, 111444623476 + ... + 111444623493.

Almost surely, 2^{2006003222721} is an apocalyptic number.

It is an amenable number.

2006003222721 is a deficient number, since it is larger than the sum of its proper divisors (891556987889).

2006003222721 is a wasteful number, since it uses less digits than its factorization.

2006003222721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222889246975 (or 222889246972 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

Adding to 2006003222721 its reverse (1272223006002), we get a palindrome (3278226228723).

The spelling of 2006003222721 in words is "two trillion, six billion, three million, two hundred twenty-two thousand, seven hundred twenty-one".