100001220002001 has 32 divisors (see below), whose sum is σ = 148736093425920. Its totient is φ = 66403964420352.

The previous prime is 100001220001909. The next prime is 100001220002041. The reversal of 100001220002001 is 100200022100001.

It is not a de Polignac number, because 100001220002001 - 2¹¹ = 100001219999953 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (100001220002041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11189641 + ... + 18033593.

It is an arithmetic number, because the mean of its divisors is an integer number (4648002919560).

Almost surely, 2^{100001220002001} is an apocalyptic number.

It is an amenable number.

100001220002001 is a deficient number, since it is larger than the sum of its proper divisors (48734873423919).

100001220002001 is a wasteful number, since it uses less digits than its factorization.

100001220002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6846102 (or 6846096 counting only the distinct ones).

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

Adding to 100001220002001 its reverse (100200022100001), we get a palindrome (200201242102002).

The spelling of 100001220002001 in words is "one hundred trillion, one billion, two hundred twenty million, two thousand, one".