100001222001 has 32 divisors (see below), whose sum is σ = 154505702400. Its totient is φ = 63851742720.

The previous prime is 100001221997. The next prime is 100001222021. The reversal of 100001222001 is 100222100001.

It is not a de Polignac number, because 100001222001 - 2² = 100001221997 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 (100001222021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534666 + ... + 697043.

It is an arithmetic number, because the mean of its divisors is an integer number (4828303200).

Almost surely, 2^100001222001 is an apocalyptic number.

It is an amenable number.

100001222001 is a deficient number, since it is larger than the sum of its proper divisors (54504480399).

100001222001 is a wasteful number, since it uses less digits than its factorization.

100001222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231846 (or 1231840 counting only the distinct ones).

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

Adding to 100001222001 its reverse (100222100001), we get a palindrome (200223322002).

The spelling of 100001222001 in words is "one hundred billion, one million, two hundred twenty-two thousand, one".