10020002002001 has 4 divisors (see below), whose sum is σ = 10020027892404. Its totient is φ = 10019976111600.

The previous prime is 10020002001949. The next prime is 10020002002019. The reversal of 10020002002001 is 10020020002001.

10020002002001 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 can be written as a sum of positive squares in 2 ways, for example, as 134788108225 + 9885213893776 = 367135^2 + 3144076^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020002002001 - 2⁶ = 10020002001937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10020002002001.

It is not an unprimeable number, because it can be changed into a prime (10020002002061) 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, 12355730 + ... + 13141691.

It is an arithmetic number, because the mean of its divisors is an integer number (2505006973101).

Almost surely, 2^{10020002002001} is an apocalyptic number.

It is an amenable number.

10020002002001 is a deficient number, since it is larger than the sum of its proper divisors (25890403).

10020002002001 is an equidigital number, since it uses as much as digits as its factorization.

10020002002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25890402.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 10020002002001 its reverse (10020020002001), we get a palindrome (20040022004002).

The spelling of 10020002002001 in words is "ten trillion, twenty billion, two million, two thousand, one".