212102112222 has 128 divisors (see below), whose sum is σ = 632845624320. Its totient is φ = 50853640320.

The previous prime is 212102112107. The next prime is 212102112239. The reversal of 212102112222 is 222211201212.

It is a happy number.

212102112222 is a `hidden beast` number, since 21 + 210 + 211 + 2 + 222 = 666.

212102112222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 212102112195 and 212102112204.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 1907893 + ... + 2016000.

It is an arithmetic number, because the mean of its divisors is an integer number (4944106440).

Almost surely, 2^212102112222 is an apocalyptic number.

212102112222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212102112222 is an abundant number, since it is smaller than the sum of its proper divisors (420743512098).

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

212102112222 is a wasteful number, since it uses less digits than its factorization.

212102112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923935 (or 3923929 counting only the distinct ones).

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

Adding to 212102112222 its reverse (222211201212), we get a palindrome (434313313434).

The spelling of 212102112222 in words is "two hundred twelve billion, one hundred two million, one hundred twelve thousand, two hundred twenty-two".