1001200001 has 4 divisors (see below), whose sum is σ = 1010060292. Its totient is φ = 992339712.

The previous prime is 1001199937. The next prime is 1001200007. The reversal of 1001200001 is 1000021001.

It is a happy number.

1001200001 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 an emirpimes, since its reverse is a distinct semiprime: 1000021001 = 7 ⋅142860143.

It can be written as a sum of positive squares in 2 ways, for example, as 314707600 + 686492401 = 17740^2 + 26201^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001200001 - 2⁶ = 1001199937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001200007) 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, 4429976 + ... + 4430201.

It is an arithmetic number, because the mean of its divisors is an integer number (252515073).

Almost surely, 2^1001200001 is an apocalyptic number.

It is an amenable number.

1001200001 is a deficient number, since it is larger than the sum of its proper divisors (8860291).

1001200001 is an equidigital number, since it uses as much as digits as its factorization.

1001200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860290.

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

The square root of 1001200001 is about 31641.7445947596. The cubic root of 1001200001 is about 1000.3998404396.

Adding to 1001200001 its reverse (1000021001), we get a palindrome (2001221002).

The spelling of 1001200001 in words is "one billion, one million, two hundred thousand, one".