221232013120 has 28 divisors (see below), whose sum is σ = 526808732004. Its totient is φ = 88492805120.

The previous prime is 221232013109. The next prime is 221232013129. The reversal of 221232013120 is 21310232122.

It can be written as a sum of positive squares in 2 ways, for example, as 127380465216 + 93851547904 = 356904^2 + 306352^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232013129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345674701 + ... + 345675340.

Almost surely, 2^221232013120 is an apocalyptic number.

221232013120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221232013120 is an abundant number, since it is smaller than the sum of its proper divisors (305576718884).

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

221232013120 is an equidigital number, since it uses as much as digits as its factorization.

221232013120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691350058 (or 691350048 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221232013120 its reverse (21310232122), we get a palindrome (242542245242).

The spelling of 221232013120 in words is "two hundred twenty-one billion, two hundred thirty-two million, thirteen thousand, one hundred twenty".