221331120312 has 16 divisors (see below), whose sum is σ = 553327800840. Its totient is φ = 73777040096.

The previous prime is 221331120293. The next prime is 221331120379. The reversal of 221331120312 is 213021133122.

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 3 ways as a sum of consecutive naturals, for example, 4611064983 + ... + 4611065030.

Almost surely, 2^221331120312 is an apocalyptic number.

It is an amenable number.

221331120312 is an abundant number, since it is smaller than the sum of its proper divisors (331996680528).

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

221331120312 is a wasteful number, since it uses less digits than its factorization.

221331120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9222130022 (or 9222130018 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221331120312 its reverse (213021133122), we get a palindrome (434352253434).

The spelling of 221331120312 in words is "two hundred twenty-one billion, three hundred thirty-one million, one hundred twenty thousand, three hundred twelve".