210012102121 has 4 divisors (see below), whose sum is σ = 210077306244. Its totient is φ = 209946898000.

The previous prime is 210012102107. The next prime is 210012102137. The reversal of 210012102121 is 121201210012.

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 95657211225 + 114354890896 = 309285^2 + 338164^2 .

It is a cyclic number.

It is not a de Polignac number, because 210012102121 - 2¹¹ = 210012100073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210012102161) 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, 32597230 + ... + 32603671.

It is an arithmetic number, because the mean of its divisors is an integer number (52519326561).

Almost surely, 2^210012102121 is an apocalyptic number.

It is an amenable number.

210012102121 is a deficient number, since it is larger than the sum of its proper divisors (65204123).

210012102121 is an equidigital number, since it uses as much as digits as its factorization.

210012102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65204122.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210012102121 its reverse (121201210012), we get a palindrome (331213312133).

The spelling of 210012102121 in words is "two hundred ten billion, twelve million, one hundred two thousand, one hundred twenty-one".