212122110 has 128 divisors (see below), whose sum is σ = 551577600. Its totient is φ = 52116480.

The previous prime is 212122109. The next prime is 212122121. The reversal of 212122110 is 11221212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2685051 + ... + 2685129.

It is an arithmetic number, because the mean of its divisors is an integer number (4309200).

Almost surely, 2^212122110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212122110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275788800).

212122110 is an abundant number, since it is smaller than the sum of its proper divisors (339455490).

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

212122110 is a wasteful number, since it uses less digits than its factorization.

212122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 212122110 is about 14564.4124495292. The cubic root of 212122110 is about 596.3876563796.

Adding to 212122110 its reverse (11221212), we get a palindrome (223343322).

The spelling of 212122110 in words is "two hundred twelve million, one hundred twenty-two thousand, one hundred ten".