1000012002001 has 4 divisors (see below), whose sum is σ = 1000015614772. Its totient is φ = 1000008389232.

The previous prime is 1000012001983. The next prime is 1000012002019. The reversal of 1000012002001 is 1002002100001.

1000012002001 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.

It is an interprime number because it is at equal distance from previous prime (1000012001983) and next prime (1000012002019).

It can be written as a sum of positive squares in 2 ways, for example, as 228530846401 + 771481155600 = 478049^2 + 878340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000012002001 - 2¹³ = 1000011993809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000012002071) 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, 1353306 + ... + 1957411.

It is an arithmetic number, because the mean of its divisors is an integer number (250003903693).

Almost surely, 2^{1000012002001} is an apocalyptic number.

It is an amenable number.

1000012002001 is a deficient number, since it is larger than the sum of its proper divisors (3612771).

1000012002001 is an equidigital number, since it uses as much as digits as its factorization.

1000012002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612770.

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

Adding to 1000012002001 its reverse (1002002100001), we get a palindrome (2002014102002).

The spelling of 1000012002001 in words is "one trillion, twelve million, two thousand, one".