212102110222220 has 24 divisors (see below), whose sum is σ = 445414814221104. Its totient is φ = 84840771183296.

The previous prime is 212102110222217. The next prime is 212102110222237. The reversal of 212102110222220 is 22222011201212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212102110222192 and 212102110222201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23518499 + ... + 31262181.

It is an arithmetic number, because the mean of its divisors is an integer number (18558950592546).

Almost surely, 2^{212102110222220} is an apocalyptic number.

212102110222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102110222220 is an abundant number, since it is smaller than the sum of its proper divisors (233312703998884).

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

212102110222220 is a wasteful number, since it uses less digits than its factorization.

212102110222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9113209 (or 9113207 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212102110222220 its reverse (22222011201212), we get a palindrome (234324121423432).

The spelling of 212102110222220 in words is "two hundred twelve trillion, one hundred two billion, one hundred ten million, two hundred twenty-two thousand, two hundred twenty".