2221000001 has 4 divisors (see below), whose sum is σ = 2422909104. Its totient is φ = 2019090900.

The previous prime is 2220999997. The next prime is 2221000043. The reversal of 2221000001 is 1000001222.

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 2221000001 - 2² = 2220999997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221000081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100954535 + ... + 100954556.

It is an arithmetic number, because the mean of its divisors is an integer number (605727276).

Almost surely, 2^2221000001 is an apocalyptic number.

It is an amenable number.

2221000001 is a deficient number, since it is larger than the sum of its proper divisors (201909103).

2221000001 is a wasteful number, since it uses less digits than its factorization.

2221000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201909102.

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

The square root of 2221000001 is about 47127.4866824022. The cubic root of 2221000001 is about 1304.7165947996.

Adding to 2221000001 its reverse (1000001222), we get a palindrome (3221001223).

It can be divided in two parts, 222 and 1000001, that multiplied together give a palindrome (222000222).

The spelling of 2221000001 in words is "two billion, two hundred twenty-one million, one", and thus it is an aban number.