1001000022001 has 12 divisors (see below), whose sum is σ = 1195901732032. Its totient is φ = 820695667176.

The previous prime is 1001000021963. The next prime is 1001000022019. The reversal of 1001000022001 is 1002200001001.

It is not a de Polignac number, because 1001000022001 - 2¹³ = 1001000013809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (1001000022401) 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 11 ways as a sum of consecutive naturals, for example, 135156981 + ... + 135164386.

Almost surely, 2^{1001000022001} is an apocalyptic number.

It is an amenable number.

1001000022001 is a deficient number, since it is larger than the sum of its proper divisors (194901710031).

1001000022001 is an equidigital number, since it uses as much as digits as its factorization.

1001000022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270321420 (or 270321397 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1001000022001 its reverse (1002200001001), we get a palindrome (2003200023002).

The spelling of 1001000022001 in words is "one trillion, one billion, twenty-two thousand, one".