2001222006 has 64 divisors (see below), whose sum is σ = 4824230400. Its totient is φ = 540642816.

The previous prime is 2001222001. The next prime is 2001222011. The reversal of 2001222006 is 6002221002.

It is an interprime number because it is at equal distance from previous prime (2001222001) and next prime (2001222011).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471100 + ... + 475328.

It is an arithmetic number, because the mean of its divisors is an integer number (75378600).

Almost surely, 2^2001222006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001222006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2412115200).

2001222006 is an abundant number, since it is smaller than the sum of its proper divisors (2823008394).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001222006 is a wasteful number, since it uses less digits than its factorization.

2001222006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4853.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2001222006 is about 44735.0199061094. The cubic root of 2001222006 is about 1260.1776028308.

Adding to 2001222006 its reverse (6002221002), we get a palindrome (8003443008).

The spelling of 2001222006 in words is "two billion, one million, two hundred twenty-two thousand, six".