1100002001 has 4 divisors (see below), whose sum is σ = 1257145152. Its totient is φ = 942858852.

The previous prime is 1100001977. The next prime is 1100002031. The reversal of 1100002001 is 1002000011.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1002000011 = 31 ⋅32322581.

It is a cyclic number.

It is not a de Polignac number, because 1100002001 - 2³⁰ = 26260177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100002031) 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, 78571565 + ... + 78571578.

It is an arithmetic number, because the mean of its divisors is an integer number (314286288).

Almost surely, 2^1100002001 is an apocalyptic number.

It is an amenable number.

1100002001 is a deficient number, since it is larger than the sum of its proper divisors (157143151).

1100002001 is an equidigital number, since it uses as much as digits as its factorization.

1100002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157143150.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1100002001 is about 33166.2780697503. The cubic root of 1100002001 is about 1032.2807413931.

Adding to 1100002001 its reverse (1002000011), we get a palindrome (2102002012).

The spelling of 1100002001 in words is "one billion, one hundred million, two thousand, one".