2220001001 has 4 divisors (see below), whose sum is σ = 2220399504. Its totient is φ = 2219602500.

The previous prime is 2220000997. The next prime is 2220001013. The reversal of 2220001001 is 1001000222.

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 2220001001 - 2² = 2220000997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2220001001.

It is not an unprimeable number, because it can be changed into a prime (2220001031) 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, 190775 + ... + 202076.

It is an arithmetic number, because the mean of its divisors is an integer number (555099876).

Almost surely, 2^2220001001 is an apocalyptic number.

It is an amenable number.

2220001001 is a deficient number, since it is larger than the sum of its proper divisors (398503).

2220001001 is an equidigital number, since it uses as much as digits as its factorization.

2220001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398502.

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

The square root of 2220001001 is about 47116.8865800787. The cubic root of 2220001001 is about 1304.5209460903.

Adding to 2220001001 its reverse (1001000222), we get a palindrome (3221001223).

The spelling of 2220001001 in words is "two billion, two hundred twenty million, one thousand, one".