221343242231312 has 20 divisors (see below), whose sum is σ = 428852795094480. Its totient is φ = 110671553174688.

The previous prime is 221343242231291. The next prime is 221343242231359. The reversal of 221343242231312 is 213132242343122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32014139 + ... + 38309157.

It is an arithmetic number, because the mean of its divisors is an integer number (21442639754724).

Almost surely, 2^{221343242231312} is an apocalyptic number.

It is an amenable number.

221343242231312 is a deficient number, since it is larger than the sum of its proper divisors (207509552863168).

221343242231312 is a wasteful number, since it uses less digits than its factorization.

221343242231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492630 (or 8492624 counting only the distinct ones).

The product of its digits is 82944, while the sum is 35.

Adding to 221343242231312 its reverse (213132242343122), we get a palindrome (434475484574434).

The spelling of 221343242231312 in words is "two hundred twenty-one trillion, three hundred forty-three billion, two hundred forty-two million, two hundred thirty-one thousand, three hundred twelve".