221123112 has 32 divisors (see below), whose sum is σ = 631780800. Its totient is φ = 63177984.

The previous prime is 221123101. The next prime is 221123113. The reversal of 221123112 is 211321122.

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 = 221123091 and 221123100.

It is not an unprimeable number, because it can be changed into a prime (221123113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657937 + ... + 658272.

It is an arithmetic number, because the mean of its divisors is an integer number (19743150).

Almost surely, 2^221123112 is an apocalyptic number.

It is an amenable number.

221123112 is an abundant number, since it is smaller than the sum of its proper divisors (410657688).

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

221123112 is a wasteful number, since it uses less digits than its factorization.

221123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316225 (or 1316221 counting only the distinct ones).

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

The square root of 221123112 is about 14870.2088754664. The cubic root of 221123112 is about 604.7066054590.

Adding to 221123112 its reverse (211321122), we get a palindrome (432444234).

The spelling of 221123112 in words is "two hundred twenty-one million, one hundred twenty-three thousand, one hundred twelve".