210002000121 has 48 divisors (see below), whose sum is σ = 313322353344. Its totient is φ = 135438106752.

The previous prime is 210002000119. The next prime is 210002000147. The reversal of 210002000121 is 121000200012.

It is not a de Polignac number, because 210002000121 - 2¹ = 210002000119 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (210002000191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45286015 + ... + 45290651.

It is an arithmetic number, because the mean of its divisors is an integer number (6527549028).

Almost surely, 2^210002000121 is an apocalyptic number.

It is an amenable number.

210002000121 is a deficient number, since it is larger than the sum of its proper divisors (103320353223).

210002000121 is a wasteful number, since it uses less digits than its factorization.

210002000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5430 (or 5427 counting only the distinct ones).

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

Adding to 210002000121 its reverse (121000200012), we get a palindrome (331002200133).

The spelling of 210002000121 in words is "two hundred ten billion, two million, one hundred twenty-one", and thus it is an aban number.