210000010121 has 16 divisors (see below), whose sum is σ = 231650411328. Its totient is φ = 188780952000.

The previous prime is 210000010081. The next prime is 210000010123. The reversal of 210000010121 is 121010000012.

It is a cyclic number.

It is not a de Polignac number, because 210000010121 - 2¹⁸ = 209999747977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210000010099 and 210000010108.

It is not an unprimeable number, because it can be changed into a prime (210000010123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766886 + ... + 1004048.

It is an arithmetic number, because the mean of its divisors is an integer number (14478150708).

Almost surely, 2^210000010121 is an apocalyptic number.

It is an amenable number.

210000010121 is a deficient number, since it is larger than the sum of its proper divisors (21650401207).

210000010121 is a wasteful number, since it uses less digits than its factorization.

210000010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238072.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 210000010121 its reverse (121010000012), we get a palindrome (331010010133).

The spelling of 210000010121 in words is "two hundred ten billion, ten thousand, one hundred twenty-one".