2001001223 has 4 divisors (see below), whose sum is σ = 2154924408. Its totient is φ = 1847078040.

The previous prime is 2001001183. The next prime is 2001001241. The reversal of 2001001223 is 3221001002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3221001002 = 2 ⋅1610500501.

It is a cyclic number.

It is not a de Polignac number, because 2001001223 - 2⁶ = 2001001159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001001243) 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 3 ways as a sum of consecutive naturals, for example, 76961573 + ... + 76961598.

It is an arithmetic number, because the mean of its divisors is an integer number (538731102).

Almost surely, 2^2001001223 is an apocalyptic number.

2001001223 is a deficient number, since it is larger than the sum of its proper divisors (153923185).

2001001223 is a wasteful number, since it uses less digits than its factorization.

2001001223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153923184.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2001001223 is about 44732.5521628266. The cubic root of 2001001223 is about 1260.1312584767.

Adding to 2001001223 its reverse (3221001002), we get a palindrome (5222002225).

The spelling of 2001001223 in words is "two billion, one million, one thousand, two hundred twenty-three".