21211100000210 has 8 divisors (see below), whose sum is σ = 38179980000396. Its totient is φ = 8484440000080.

The previous prime is 21211100000159. The next prime is 21211100000221. The reversal of 21211100000210 is 1200000111212.

It can be written as a sum of positive squares in 2 ways, for example, as 18675422751049 + 2535677249161 = 4321507^2 + 1592381^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21211100000191 and 21211100000200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060555000001 + ... + 1060555000020.

Almost surely, 2^{21211100000210} is an apocalyptic number.

21211100000210 is a deficient number, since it is larger than the sum of its proper divisors (16968880000186).

21211100000210 is a wasteful number, since it uses less digits than its factorization.

21211100000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121110000028.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21211100000210 its reverse (1200000111212), we get a palindrome (22411100111422).

The spelling of 21211100000210 in words is "twenty-one trillion, two hundred eleven billion, one hundred million, two hundred ten", and thus it is an aban number.