2001123222 has 32 divisors (see below), whose sum is σ = 4721547264. Its totient is φ = 553305600.

The previous prime is 2001123209. The next prime is 2001123269. The reversal of 2001123222 is 2223211002.

It is a happy number.

It is a super-2 number, since 2×2001123222² = 8008988299255322568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767179 + ... + 769782.

It is an arithmetic number, because the mean of its divisors is an integer number (147548352).

Almost surely, 2^2001123222 is an apocalyptic number.

2001123222 is an abundant number, since it is smaller than the sum of its proper divisors (2720424042).

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

2001123222 is a wasteful number, since it uses less digits than its factorization.

2001123222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537004.

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

The square root of 2001123222 is about 44733.9157910416. The cubic root of 2001123222 is about 1260.1568675947.

Adding to 2001123222 its reverse (2223211002), we get a palindrome (4224334224).

The spelling of 2001123222 in words is "two billion, one million, one hundred twenty-three thousand, two hundred twenty-two".