221122111112 has 64 divisors (see below), whose sum is σ = 508182595200. Its totient is φ = 88084938240.

The previous prime is 221122111103. The next prime is 221122111193. The reversal of 221122111112 is 211111221122.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1904189 + ... + 2016972.

It is an arithmetic number, because the mean of its divisors is an integer number (7940353050).

Almost surely, 2^221122111112 is an apocalyptic number.

It is an amenable number.

221122111112 is an abundant number, since it is smaller than the sum of its proper divisors (287060484088).

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

221122111112 is a wasteful number, since it uses less digits than its factorization.

221122111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921246 (or 3921242 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 221122111112 its reverse (211111221122), we get a palindrome (432233332234).

The spelling of 221122111112 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twelve".