1000320002221 has 4 divisors (see below), whose sum is σ = 1016718690844. Its totient is φ = 983921313600.

The previous prime is 1000320002159. The next prime is 1000320002251. The reversal of 1000320002221 is 1222000230001.

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 288804134025 + 711515868196 = 537405^2 + 843514^2 .

It is not a de Polignac number, because 1000320002221 - 2⁷ = 1000320002093 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 (1000320002251) 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, 8199344220 + ... + 8199344341.

It is an arithmetic number, because the mean of its divisors is an integer number (254179672711).

Almost surely, 2^{1000320002221} is an apocalyptic number.

It is an amenable number.

1000320002221 is a deficient number, since it is larger than the sum of its proper divisors (16398688623).

1000320002221 is an equidigital number, since it uses as much as digits as its factorization.

1000320002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16398688622.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 1000320002221 its reverse (1222000230001), we get a palindrome (2222320232222).

The spelling of 1000320002221 in words is "one trillion, three hundred twenty million, two thousand, two hundred twenty-one".