2001222223 has 16 divisors (see below), whose sum is σ = 2686957056. Its totient is φ = 1439439840.

The previous prime is 2001222221. The next prime is 2001222257. The reversal of 2001222223 is 3222221002.

It is a cyclic number.

It is not a de Polignac number, because 2001222223 - 2¹ = 2001222221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001222197 and 2001222206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222221) 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 15 ways as a sum of consecutive naturals, for example, 998611 + ... + 1000612.

It is an arithmetic number, because the mean of its divisors is an integer number (167934816).

Almost surely, 2^2001222223 is an apocalyptic number.

2001222223 is a deficient number, since it is larger than the sum of its proper divisors (685734833).

2001222223 is a wasteful number, since it uses less digits than its factorization.

2001222223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999254.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2001222223 is about 44735.0223315022. The cubic root of 2001222223 is about 1260.1776483794.

Adding to 2001222223 its reverse (3222221002), we get a palindrome (5223443225).

The spelling of 2001222223 in words is "two billion, one million, two hundred twenty-two thousand, two hundred twenty-three".