2001221093 has 8 divisors (see below), whose sum is σ = 2021567808. Its totient is φ = 1980892224.

The previous prime is 2001221077. The next prime is 2001221119. The reversal of 2001221093 is 3901221002.

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 2001221093 - 2⁴ = 2001221077 is a prime.

It is a super-2 number, since 2×2001221093² = 8009771726136229298, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001221063) 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 7 ways as a sum of consecutive naturals, for example, 437846 + ... + 442392.

It is an arithmetic number, because the mean of its divisors is an integer number (252695976).

Almost surely, 2^2001221093 is an apocalyptic number.

It is an amenable number.

2001221093 is a deficient number, since it is larger than the sum of its proper divisors (20346715).

2001221093 is a wasteful number, since it uses less digits than its factorization.

2001221093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2001221093 is about 44735.0097015749. The cubic root of 2001221093 is about 1260.1774111909.

Adding to 2001221093 its reverse (3901221002), we get a palindrome (5902442095).

The spelling of 2001221093 in words is "two billion, one million, two hundred twenty-one thousand, ninety-three".