2001033221 has 8 divisors (see below), whose sum is σ = 2204140224. Its totient is φ = 1801458720.

The previous prime is 2001033211. The next prime is 2001033233. The reversal of 2001033221 is 1223301002.

It is a happy number.

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 2001033221 - 2¹⁸ = 2000771077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001033196 and 2001033205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001033211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881936 + ... + 884201.

It is an arithmetic number, because the mean of its divisors is an integer number (275517528).

Almost surely, 2^2001033221 is an apocalyptic number.

It is an amenable number.

2001033221 is a deficient number, since it is larger than the sum of its proper divisors (203107003).

2001033221 is a wasteful number, since it uses less digits than its factorization.

2001033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766251.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2001033221 is about 44732.9098203996. The cubic root of 2001033221 is about 1260.1379753584.

Adding to 2001033221 its reverse (1223301002), we get a palindrome (3224334223).

The spelling of 2001033221 in words is "two billion, one million, thirty-three thousand, two hundred twenty-one".