21223112110210 has 8 divisors (see below), whose sum is σ = 38201601798396. Its totient is φ = 8489244844080.

The previous prime is 21223112110201. The next prime is 21223112110253. The reversal of 21223112110210 is 1201121132212.

It can be written as a sum of positive squares in 2 ways, for example, as 19976671603729 + 1246440506481 = 4469527^2 + 1116441^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061155605501 + ... + 1061155605520.

Almost surely, 2^{21223112110210} is an apocalyptic number.

21223112110210 is a deficient number, since it is larger than the sum of its proper divisors (16978489688186).

21223112110210 is a wasteful number, since it uses less digits than its factorization.

21223112110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122311211028.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21223112110210 its reverse (1201121132212), we get a palindrome (22424233242422).

The spelling of 21223112110210 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred twelve million, one hundred ten thousand, two hundred ten".