2201021001 has 12 divisors (see below), whose sum is σ = 3183302512. Its totient is φ = 1465478136.

The previous prime is 2201020967. The next prime is 2201021003. The reversal of 2201021001 is 1001201022.

It is not a de Polignac number, because 2201021001 - 2⁷ = 2201020873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2201021003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148291 + ... + 162456.

Almost surely, 2^2201021001 is an apocalyptic number.

It is an amenable number.

2201021001 is a deficient number, since it is larger than the sum of its proper divisors (982281511).

2201021001 is a wasteful number, since it uses less digits than its factorization.

2201021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311540 (or 311537 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2201021001 is about 46915.0402429754. The cubic root of 2201021001 is about 1300.7926134874.

Adding to 2201021001 its reverse (1001201022), we get a palindrome (3202222023).

The spelling of 2201021001 in words is "two billion, two hundred one million, twenty-one thousand, one".