2001222101001 has 16 divisors (see below), whose sum is σ = 2697271632000. Its totient is φ = 1319701189248.

The previous prime is 2001222100987. The next prime is 2001222101063. The reversal of 2001222101001 is 1001012221002.

It is not a de Polignac number, because 2001222101001 - 2¹⁹ = 2001221576713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001222101101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4912596 + ... + 5304341.

It is an arithmetic number, because the mean of its divisors is an integer number (168579477000).

Almost surely, 2^{2001222101001} is an apocalyptic number.

It is an amenable number.

2001222101001 is a deficient number, since it is larger than the sum of its proper divisors (696049530999).

2001222101001 is a wasteful number, since it uses less digits than its factorization.

2001222101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10217648.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001222101001 its reverse (1001012221002), we get a palindrome (3002234322003).

The spelling of 2001222101001 in words is "two trillion, one billion, two hundred twenty-two million, one hundred one thousand, one".