201002000121 has 16 divisors (see below), whose sum is σ = 320686952320. Its totient is φ = 123693538320.

The previous prime is 201002000063. The next prime is 201002000191. The reversal of 201002000121 is 121000200102.

It is not a de Polignac number, because 201002000121 - 2¹¹ = 201001998073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201002000191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286327285 + ... + 286327986.

It is an arithmetic number, because the mean of its divisors is an integer number (20042934520).

Almost surely, 2^201002000121 is an apocalyptic number.

It is an amenable number.

201002000121 is a deficient number, since it is larger than the sum of its proper divisors (119684952199).

201002000121 is a wasteful number, since it uses less digits than its factorization.

201002000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572655293 (or 572655287 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 201002000121 its reverse (121000200102), we get a palindrome (322002200223).

The spelling of 201002000121 in words is "two hundred one billion, two million, one hundred twenty-one", and thus it is an aban number.