21210101110210 has 16 divisors (see below), whose sum is σ = 38638160096256. Its totient is φ = 8381823089008.

The previous prime is 21210101110199. The next prime is 21210101110241. The reversal of 21210101110210 is 1201110101212.

It is a happy 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, 12777168514 + ... + 12777170173.

It is an arithmetic number, because the mean of its divisors is an integer number (2414885006016).

Almost surely, 2^{21210101110210} is an apocalyptic number.

21210101110210 is a deficient number, since it is larger than the sum of its proper divisors (17428058986046).

21210101110210 is a wasteful number, since it uses less digits than its factorization.

21210101110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25554338777.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21210101110210 its reverse (1201110101212), we get a palindrome (22411211211422).

The spelling of 21210101110210 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, one hundred ten thousand, two hundred ten".