210010002121 has 4 divisors (see below), whose sum is σ = 210018008452. Its totient is φ = 210001995792.

The previous prime is 210010002101. The next prime is 210010002161. The reversal of 210010002121 is 121200010012.

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 42372164025 + 167637838096 = 205845^2 + 409436^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010002121 - 2¹¹ = 210010000073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210010002098 and 210010002107.

It is not an unprimeable number, because it can be changed into a prime (210010002101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3963690 + ... + 4016323.

It is an arithmetic number, because the mean of its divisors is an integer number (52504502113).

Almost surely, 2^210010002121 is an apocalyptic number.

It is an amenable number.

210010002121 is a deficient number, since it is larger than the sum of its proper divisors (8006331).

210010002121 is an equidigital number, since it uses as much as digits as its factorization.

210010002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8006330.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210010002121 its reverse (121200010012), we get a palindrome (331210012133).

The spelling of 210010002121 in words is "two hundred ten billion, ten million, two thousand, one hundred twenty-one".