212212212210 has 96 divisors (see below), whose sum is σ = 573338787840. Its totient is φ = 54393381504.

The previous prime is 212212212101. The next prime is 212212212259. The reversal of 212212212210 is 12212212212.

It is a happy number.

212212212210 is a `hidden beast` number, since 2 + 1 + 221 + 221 + 221 + 0 = 666.

212212212210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212212212210² (a number of 23 digits) contains 22 as substring.

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

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 47 ways as a sum of consecutive naturals, for example, 399727 + ... + 764333.

It is an arithmetic number, because the mean of its divisors is an integer number (5972279040).

Almost surely, 2^212212212210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212212212210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286669393920).

212212212210 is an abundant number, since it is smaller than the sum of its proper divisors (361126575630).

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

212212212210 is a wasteful number, since it uses less digits than its factorization.

212212212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364872 (or 364869 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212212212210 its reverse (12212212212), we get a palindrome (224424424422).

The spelling of 212212212210 in words is "two hundred twelve billion, two hundred twelve million, two hundred twelve thousand, two hundred ten".