100001221000002 has 96 divisors (see below), whose sum is σ = 273712825909440. Its totient is φ = 26891084626560.

The previous prime is 100001220999983. The next prime is 100001221000013. The reversal of 100001221000002 is 200000122100001.

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 (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1111524324 + ... + 1111614287.

It is an arithmetic number, because the mean of its divisors is an integer number (2851175269890).

Almost surely, 2^{100001221000002} is an apocalyptic number.

100001221000002 is an abundant number, since it is smaller than the sum of its proper divisors (173711604909438).

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

100001221000002 is a wasteful number, since it uses less digits than its factorization.

100001221000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223138653 (or 2223138640 counting only the distinct ones).

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

Adding to 100001221000002 its reverse (200000122100001), we get a palindrome (300001343100003).

The spelling of 100001221000002 in words is "one hundred trillion, one billion, two hundred twenty-one million, two", and thus it is an aban number.