2001222222001 has 8 divisors (see below), whose sum is σ = 2013189262560. Its totient is φ = 1989271656192.

The previous prime is 2001222221987. The next prime is 2001222222017. The reversal of 2001222222001 is 1002222221002.

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 2001222222001 - 2⁹ = 2001222221489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001222222031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3874975 + ... + 4360948.

It is an arithmetic number, because the mean of its divisors is an integer number (251648657820).

Almost surely, 2^{2001222222001} is an apocalyptic number.

It is an amenable number.

2001222222001 is a deficient number, since it is larger than the sum of its proper divisors (11967040559).

2001222222001 is a wasteful number, since it uses less digits than its factorization.

2001222222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8237375.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2001222222001 its reverse (1002222221002), we get a palindrome (3003444443003).

Subtracting from 2001222222001 its reverse (1002222221002), we obtain a palindrome (999000000999).

The spelling of 2001222222001 in words is "two trillion, one billion, two hundred twenty-two million, two hundred twenty-two thousand, one".