2001022201001 has 8 divisors (see below), whose sum is σ = 2007539251200. Its totient is φ = 1994511883072.

The previous prime is 2001022200997. The next prime is 2001022201109. The reversal of 2001022201001 is 1001022201002.

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 2001022201001 - 2² = 2001022200997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001022201901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087301 + ... + 2276898.

It is an arithmetic number, because the mean of its divisors is an integer number (250942406400).

Almost surely, 2^{2001022201001} is an apocalyptic number.

It is an amenable number.

2001022201001 is a deficient number, since it is larger than the sum of its proper divisors (6517050199).

2001022201001 is a wasteful number, since it uses less digits than its factorization.

2001022201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366135.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2001022201001 its reverse (1001022201002), we get a palindrome (3002044402003).

Subtracting from 2001022201001 its reverse (1001022201002), we obtain a palindrome (999999999999).

The spelling of 2001022201001 in words is "two trillion, one billion, twenty-two million, two hundred one thousand, one".