211121211110210 has 8 divisors (see below), whose sum is σ = 380018179998396. Its totient is φ = 84448484444080.

The previous prime is 211121211110143. The next prime is 211121211110231. The reversal of 211121211110210 is 12011112121112.

It can be written as a sum of positive squares in 2 ways, for example, as 204488541402601 + 6632669707609 = 14299949^2 + 2575397^2 .

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

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, 10556060555501 + ... + 10556060555520.

Almost surely, 2^{211121211110210} is an apocalyptic number.

211121211110210 is a deficient number, since it is larger than the sum of its proper divisors (168896968888186).

211121211110210 is a wasteful number, since it uses less digits than its factorization.

211121211110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21112121111028.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 211121211110210 its reverse (12011112121112), we get a palindrome (223132323231322).

The spelling of 211121211110210 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, two hundred ten".