2001012223 has 8 divisors (see below), whose sum is σ = 2314424448. Its totient is φ = 1694488344.

The previous prime is 2001012179. The next prime is 2001012229. The reversal of 2001012223 is 3222101002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001012223 - 2⁹ = 2001011711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001012229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1721461 + ... + 1722622.

It is an arithmetic number, because the mean of its divisors is an integer number (289303056).

Almost surely, 2^2001012223 is an apocalyptic number.

2001012223 is a deficient number, since it is larger than the sum of its proper divisors (313412225).

2001012223 is an equidigital number, since it uses as much as digits as its factorization.

2001012223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444173.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2001012223 is about 44732.6751156244. The cubic root of 2001012223 is about 1260.1335675572.

Adding to 2001012223 its reverse (3222101002), we get a palindrome (5223113225).

The spelling of 2001012223 in words is "two billion, one million, twelve thousand, two hundred twenty-three".