2001000222 has 72 divisors (see below), whose sum is σ = 4774653000. Its totient is φ = 605202624.

The previous prime is 2001000151. The next prime is 2001000223. The reversal of 2001000222 is 2220001002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001000223) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 173904 + ... + 185052.

It is an arithmetic number, because the mean of its divisors is an integer number (66314625).

Almost surely, 2^2001000222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001000222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387326500).

2001000222 is an abundant number, since it is smaller than the sum of its proper divisors (2773652778).

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

2001000222 is a wasteful number, since it uses less digits than its factorization.

2001000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11242 (or 11226 counting only the distinct ones).

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

The square root of 2001000222 is about 44732.5409741052. The cubic root of 2001000222 is about 1260.1310483500.

Adding to 2001000222 its reverse (2220001002), we get a palindrome (4221001224).

The spelling of 2001000222 in words is "two billion, one million, two hundred twenty-two", and thus it is an aban number.