1000002000221 has 4 divisors (see below), whose sum is σ = 1142859428832. Its totient is φ = 857144571612.

The previous prime is 1000002000211. The next prime is 1000002000227. The reversal of 1000002000221 is 1220002000001.

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 1000002000221 - 2¹⁸ = 1000001738077 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 = 1000002000199 and 1000002000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000002000227) 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, 71428714295 + ... + 71428714308.

It is an arithmetic number, because the mean of its divisors is an integer number (285714857208).

Almost surely, 2^{1000002000221} is an apocalyptic number.

It is an amenable number.

1000002000221 is a deficient number, since it is larger than the sum of its proper divisors (142857428611).

1000002000221 is an equidigital number, since it uses as much as digits as its factorization.

1000002000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142857428610.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 1000002000221 its reverse (1220002000001), we get a palindrome (2220004000222).

The spelling of 1000002000221 in words is "one trillion, two million, two hundred twenty-one", and thus it is an aban number.