2002220001 has 18 divisors (see below), whose sum is σ = 2995273190. Its totient is φ = 1288780416.

The previous prime is 2002219991. The next prime is 2002220029. The reversal of 2002220001 is 1000222002.

It can be written as a sum of positive squares in 3 ways, for example, as 6275025 + 1995944976 = 2505^2 + 44676^2 .

It is not a de Polignac number, because 2002220001 - 2⁵ = 2002219969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2002220041) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 124696 + ... + 139833.

Almost surely, 2^2002220001 is an apocalyptic number.

It is an amenable number.

2002220001 is a deficient number, since it is larger than the sum of its proper divisors (993053189).

2002220001 is a wasteful number, since it uses less digits than its factorization.

2002220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264593 (or 264561 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2002220001 is about 44746.1730318918. The cubic root of 2002220001 is about 1260.3870485163.

Adding to 2002220001 its reverse (1000222002), we get a palindrome (3002442003).

The spelling of 2002220001 in words is "two billion, two million, two hundred twenty thousand, one".