221331211120 has 80 divisors (see below), whose sum is σ = 518935839552. Its totient is φ = 87788666880.

The previous prime is 221331211093. The next prime is 221331211139. The reversal of 221331211120 is 21112133122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4778794 + ... + 4824886.

Almost surely, 2^221331211120 is an apocalyptic number.

221331211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221331211120 is an abundant number, since it is smaller than the sum of its proper divisors (297604628432).

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

221331211120 is a wasteful number, since it uses less digits than its factorization.

221331211120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46610 (or 46604 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221331211120 its reverse (21112133122), we get a palindrome (242443344242).

The spelling of 221331211120 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred eleven thousand, one hundred twenty".