221312234112 has 32 divisors (see below), whose sum is σ = 587860622880. Its totient is φ = 73770744576.

The previous prime is 221312234069. The next prime is 221312234119. The reversal of 221312234112 is 211432213122.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (221312234119) by changing a digit.

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, 288166588 + ... + 288167355.

It is an arithmetic number, because the mean of its divisors is an integer number (18370644465).

Almost surely, 2^221312234112 is an apocalyptic number.

It is an amenable number.

221312234112 is an abundant number, since it is smaller than the sum of its proper divisors (366548388768).

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

221312234112 is an equidigital number, since it uses as much as digits as its factorization.

221312234112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576333960 (or 576333948 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 221312234112 its reverse (211432213122), we get a palindrome (432744447234).

The spelling of 221312234112 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred thirty-four thousand, one hundred twelve".