2001002020201 has 4 divisors (see below), whose sum is σ = 2001112462804. Its totient is φ = 2000891577600.

The previous prime is 2001002020177. The next prime is 2001002020207. The reversal of 2001002020201 is 1020202001002.

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 349517440000 + 1651484580201 = 591200^2 + 1285101^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001002020201 - 2²⁷ = 2000867802473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001002020207) 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, 55194120 + ... + 55230361.

It is an arithmetic number, because the mean of its divisors is an integer number (500278115701).

Almost surely, 2^{2001002020201} is an apocalyptic number.

It is an amenable number.

2001002020201 is a deficient number, since it is larger than the sum of its proper divisors (110442603).

2001002020201 is a wasteful number, since it uses less digits than its factorization.

2001002020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110442602.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2001002020201 its reverse (1020202001002), we get a palindrome (3021204021203).

The spelling of 2001002020201 in words is "two trillion, one billion, two million, twenty thousand, two hundred one".