221043120 has 40 divisors (see below), whose sum is σ = 685234416. Its totient is φ = 58944768.

The previous prime is 221043101. The next prime is 221043127. The reversal of 221043120 is 21340122.

221043120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221043120.

It is not an unprimeable number, because it can be changed into a prime (221043127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460267 + ... + 460746.

Almost surely, 2^221043120 is an apocalyptic number.

221043120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221043120 is an abundant number, since it is smaller than the sum of its proper divisors (464191296).

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

221043120 is a wasteful number, since it uses less digits than its factorization.

221043120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921029 (or 921023 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221043120 is about 14867.5189591270. The cubic root of 221043120 is about 604.6336784752.

Adding to 221043120 its reverse (21340122), we get a palindrome (242383242).

The spelling of 221043120 in words is "two hundred twenty-one million, forty-three thousand, one hundred twenty".