210101010220205 has 8 divisors (see below), whose sum is σ = 271515151669272. Its totient is φ = 155151515239488.

The previous prime is 210101010220163. The next prime is 210101010220217. The reversal of 210101010220205 is 502022010101012.

It can be written as a sum of positive squares in 4 ways, for example, as 20058959710729 + 190042050509476 = 4478723^2 + 13785574^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210101010220205 - 2³⁶ = 210032290743469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1616161617014 + ... + 1616161617143.

It is an arithmetic number, because the mean of its divisors is an integer number (33939393958659).

Almost surely, 2^{210101010220205} is an apocalyptic number.

It is an amenable number.

210101010220205 is a deficient number, since it is larger than the sum of its proper divisors (61414141449067).

210101010220205 is a wasteful number, since it uses less digits than its factorization.

210101010220205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232323234175.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 210101010220205 its reverse (502022010101012), we get a palindrome (712123020321217).

The spelling of 210101010220205 in words is "two hundred ten trillion, one hundred one billion, ten million, two hundred twenty thousand, two hundred five".