1002100001 has 4 divisors (see below), whose sum is σ = 1145257152.
Its totient is φ = 858942852.
The previous prime is 1002099997. The next prime is 1002100007. The reversal of 1002100001 is 1000012001.
Adding to 1002100001 its reverse (1000012001), we get a palindrome (2002112002).
It is a happy number.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 1002100001 - 22 = 1002099997 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1002100007) 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 3 ways as a sum of consecutive naturals, for example, 71578565 + ... + 71578578.
It is an arithmetic number, because the mean of its divisors is an integer number (286314288).
Almost surely, 21002100001 is an apocalyptic number.
It is an amenable number.
1002100001 is a deficient number, since it is larger than the sum of its proper divisors (143157151).
1002100001 is an equidigital number, since it uses as much as digits as its factorization.
1002100001 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 143157150.
The product of its (nonzero) digits is 2, while the sum is 5.
The square root of 1002100001 is about 31655.9631191344.
The cubic root of 1002100001 is about 1000.6995109037.
The spelling of 1002100001 in words is "one billion, two million, one hundred thousand, one".