221032120 has 16 divisors (see below), whose sum is σ = 497322360. Its totient is φ = 88412832.

The previous prime is 221032109. The next prime is 221032121. The reversal of 221032120 is 21230122.

It is a self number, because there is not a number n which added to its sum of digits gives 221032120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221032121) 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, 2762862 + ... + 2762941.

Almost surely, 2^221032120 is an apocalyptic number.

221032120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221032120 is an abundant number, since it is smaller than the sum of its proper divisors (276290240).

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

221032120 is a wasteful number, since it uses less digits than its factorization.

221032120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5525814 (or 5525810 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221032120 is about 14867.1490205755. The cubic root of 221032120 is about 604.6236486361.

Adding to 221032120 its reverse (21230122), we get a palindrome (242262242).

The spelling of 221032120 in words is "two hundred twenty-one million, thirty-two thousand, one hundred twenty".