221312110213232 has 20 divisors (see below), whose sum is σ = 428793039730080. Its totient is φ = 110655841895808.

The previous prime is 221312110213213. The next prime is 221312110213283. The reversal of 221312110213232 is 232312011213122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4588613 + ... + 21533220.

It is an arithmetic number, because the mean of its divisors is an integer number (21439651986504).

Almost surely, 2^{221312110213232} is an apocalyptic number.

It is an amenable number.

221312110213232 is a deficient number, since it is larger than the sum of its proper divisors (207480929516848).

221312110213232 is a wasteful number, since it uses less digits than its factorization.

221312110213232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26651360 (or 26651354 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 221312110213232 its reverse (232312011213122), we get a palindrome (453624121426354).

The spelling of 221312110213232 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred ten million, two hundred thirteen thousand, two hundred thirty-two".