221213320312 has 32 divisors (see below), whose sum is σ = 429232226400. Its totient is φ = 106754143104.

The previous prime is 221213320297. The next prime is 221213320333. The reversal of 221213320312 is 213023312122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478453 + ... + 819355.

It is an arithmetic number, because the mean of its divisors is an integer number (13413507075).

Almost surely, 2^221213320312 is an apocalyptic number.

It is an amenable number.

221213320312 is a deficient number, since it is larger than the sum of its proper divisors (208018906088).

221213320312 is a wasteful number, since it uses less digits than its factorization.

221213320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343735 (or 343731 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221213320312 its reverse (213023312122), we get a palindrome (434236632434).

It can be divided in two parts, 22121 and 3320312, that added together give a palindrome (3342433).

The spelling of 221213320312 in words is "two hundred twenty-one billion, two hundred thirteen million, three hundred twenty thousand, three hundred twelve".