212221122111222 has 128 divisors (see below), whose sum is σ = 512626484256768. Its totient is φ = 57298803840000.

The previous prime is 212221122111197. The next prime is 212221122111227. The reversal of 212221122111222 is 222111221122212.

It is a super-3 number, since 3×212221122111222³ (a number of 44 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 212221122111192 and 212221122111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221122111227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6739972 + ... + 21676472.

It is an arithmetic number, because the mean of its divisors is an integer number (4004894408256).

Almost surely, 2^{212221122111222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221122111222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256313242128384).

212221122111222 is an abundant number, since it is smaller than the sum of its proper divisors (300405362145546).

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

212221122111222 is a wasteful number, since it uses less digits than its factorization.

212221122111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14936814.

The product of its digits is 512, while the sum is 24.

Adding to 212221122111222 its reverse (222111221122212), we get a palindrome (434332343233434).

The spelling of 212221122111222 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty-two".