221321112 has 16 divisors (see below), whose sum is σ = 553302840. Its totient is φ = 73773696.

The previous prime is 221321053. The next prime is 221321119. The reversal of 221321112 is 211123122.

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 = 221321091 and 221321100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4610833 + ... + 4610880.

Almost surely, 2^221321112 is an apocalyptic number.

It is an amenable number.

221321112 is an abundant number, since it is smaller than the sum of its proper divisors (331981728).

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

221321112 is a wasteful number, since it uses less digits than its factorization.

221321112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9221722 (or 9221718 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 221321112 is about 14876.8649923295. The cubic root of 221321112 is about 604.8870421811.

Adding to 221321112 its reverse (211123122), we get a palindrome (432444234).

The spelling of 221321112 in words is "two hundred twenty-one million, three hundred twenty-one thousand, one hundred twelve".