221120440 has 16 divisors (see below), whose sum is σ = 497521080. Its totient is φ = 88448160.

The previous prime is 221120429. The next prime is 221120441. The reversal of 221120440 is 44021122.

221120440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120441) 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, 2763966 + ... + 2764045.

Almost surely, 2^221120440 is an apocalyptic number.

221120440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120440 is an abundant number, since it is smaller than the sum of its proper divisors (276400640).

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

221120440 is a wasteful number, since it uses less digits than its factorization.

221120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5528022 (or 5528018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221120440 is about 14870.1190311309. The cubic root of 221120440 is about 604.7041697381.

Adding to 221120440 its reverse (44021122), we get a palindrome (265141562).

The spelling of 221120440 in words is "two hundred twenty-one million, one hundred twenty thousand, four hundred forty".