2001201020100 has 144 divisors (see below), whose sum is σ = 6538958285440. Its totient is φ = 524905142400.

The previous prime is 2001201020053. The next prime is 2001201020201. The reversal of 2001201020100 is 10201021002.

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

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 5910592 + ... + 6239991.

Almost surely, 2^{2001201020100} is an apocalyptic number.

2001201020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001201020100 is an abundant number, since it is smaller than the sum of its proper divisors (4537757265340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001201020100 is a wasteful number, since it uses less digits than its factorization.

2001201020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12150667 (or 12150654 counting only the distinct ones).

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

Adding to 2001201020100 its reverse (10201021002), we get a palindrome (2011402041102).

The spelling of 2001201020100 in words is "two trillion, one billion, two hundred one million, twenty thousand, one hundred".