211121111022210 has 96 divisors (see below), whose sum is σ = 571187887583040. Its totient is φ = 56106816118848.

The previous prime is 211121111022179. The next prime is 211121111022253. The reversal of 211121111022210 is 12220111121112.

It is a happy number.

211121111022210 is a `hidden beast` number, since 2 + 111 + 211 + 110 + 22 + 210 = 666.

It is a super-2 number, since 2×211121111022210² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 147549300 + ... + 148973279.

It is an arithmetic number, because the mean of its divisors is an integer number (5949873828990).

Almost surely, 2^{211121111022210} is an apocalyptic number.

211121111022210 is an abundant number, since it is smaller than the sum of its proper divisors (360066776560830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211121111022210 is a wasteful number, since it uses less digits than its factorization.

211121111022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296522894 (or 296522882 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211121111022210 its reverse (12220111121112), we get a palindrome (223341222143322).

The spelling of 211121111022210 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred eleven million, twenty-two thousand, two hundred ten".