221222222112112 has 20 divisors (see below), whose sum is σ = 461588674984360. Its totient is φ = 102102564051648.

The previous prime is 221222222112109. The next prime is 221222222112121. The reversal of 221222222112112 is 211211222222122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531784187562 + ... + 531784187977.

It is an arithmetic number, because the mean of its divisors is an integer number (23079433749218).

Almost surely, 2^{221222222112112} is an apocalyptic number.

It is an amenable number.

221222222112112 is an abundant number, since it is smaller than the sum of its proper divisors (240366452872248).

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

221222222112112 is a wasteful number, since it uses less digits than its factorization.

221222222112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063568375560 (or 1063568375554 counting only the distinct ones).

The product of its digits is 1024, while the sum is 25.

Adding to 221222222112112 its reverse (211211222222122), we get a palindrome (432433444334234).

The spelling of 221222222112112 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twelve".