2001001222101 has 16 divisors (see below), whose sum is σ = 3049392990848. Its totient is φ = 1143336168000.

The previous prime is 2001001222049. The next prime is 2001001222117. The reversal of 2001001222101 is 1012221001002.

It is not a de Polignac number, because 2001001222101 - 2²⁵ = 2000967667669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001001222001) 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, 3614770 + ... + 4131411.

It is an arithmetic number, because the mean of its divisors is an integer number (190587061928).

Almost surely, 2^{2001001222101} is an apocalyptic number.

2001001222101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2001001222101 is a deficient number, since it is larger than the sum of its proper divisors (1048391768747).

2001001222101 is a wasteful number, since it uses less digits than its factorization.

2001001222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7758492.

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

Adding to 2001001222101 its reverse (1012221001002), we get a palindrome (3013222223103).

The spelling of 2001001222101 in words is "two trillion, one billion, one million, two hundred twenty-two thousand, one hundred one".