221122121112222 has 48 divisors (see below), whose sum is σ = 486105120132240. Its totient is φ = 67006435288320.

The previous prime is 221122121112173. The next prime is 221122121112247. The reversal of 221122121112222 is 222211121221122.

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 = 221122121112192 and 221122121112201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254488854 + ... + 255356262.

It is an arithmetic number, because the mean of its divisors is an integer number (10127190002755).

Almost surely, 2^{221122121112222} is an apocalyptic number.

221122121112222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221122121112222 is an abundant number, since it is smaller than the sum of its proper divisors (264982999020018).

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

221122121112222 is a wasteful number, since it uses less digits than its factorization.

221122121112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218569 (or 1218558 counting only the distinct ones).

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

Adding to 221122121112222 its reverse (222211121221122), we get a palindrome (443333242333344).

The spelling of 221122121112222 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-two".