221120112 has 20 divisors (see below), whose sum is σ = 571227080. Its totient is φ = 73706688.

The previous prime is 221120111. The next prime is 221120113. The reversal of 221120112 is 211021122.

It is an interprime number because it is at equal distance from previous prime (221120111) and next prime (221120113).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2303287 + ... + 2303382.

It is an arithmetic number, because the mean of its divisors is an integer number (28561354).

Almost surely, 2^221120112 is an apocalyptic number.

It is an amenable number.

221120112 is an abundant number, since it is smaller than the sum of its proper divisors (350106968).

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

221120112 is a wasteful number, since it uses less digits than its factorization.

221120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4606680 (or 4606674 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 221120112 is about 14870.1080022978. The cubic root of 221120112 is about 604.7038707411.

Adding to 221120112 its reverse (211021122), we get a palindrome (432141234).

The spelling of 221120112 in words is "two hundred twenty-one million, one hundred twenty thousand, one hundred twelve".