1000101001 has 4 divisors (see below), whose sum is σ = 1000397952. Its totient is φ = 999804052.

The previous prime is 1000100999. The next prime is 1000101079. The reversal of 1000101001 is 1001010001.

1000101001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000101001 - 2¹ = 1000100999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000401001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143365 + ... + 150178.

It is an arithmetic number, because the mean of its divisors is an integer number (250099488).

Almost surely, 2^1000101001 is an apocalyptic number.

It is an amenable number.

1000101001 is a deficient number, since it is larger than the sum of its proper divisors (296951).

1000101001 is an equidigital number, since it uses as much as digits as its factorization.

1000101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296950.

The product of its (nonzero) digits is 1, while the sum is 4.

The square root of 1000101001 is about 31624.3735273918. The cubic root of 1000101001 is about 1000.0336658666.

Adding to 1000101001 its reverse (1001010001), we get a palindrome (2001111002).

The spelling of 1000101001 in words is "one billion, one hundred one thousand, one".