221232230112012 has 96 divisors (see below), whose sum is σ = 595275304318464. Its totient is φ = 62639111808000.

The previous prime is 221232230112007. The next prime is 221232230112067. The reversal of 221232230112012 is 210211032232122.

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 31 ways as a sum of consecutive naturals, for example, 53545962 + ... + 57529422.

It is an arithmetic number, because the mean of its divisors is an integer number (6200784419984).

Almost surely, 2^{221232230112012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221232230112012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297637652159232).

221232230112012 is an abundant number, since it is smaller than the sum of its proper divisors (374043074206452).

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

221232230112012 is a wasteful number, since it uses less digits than its factorization.

221232230112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3989439 (or 3989437 counting only the distinct ones).

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

Adding to 221232230112012 its reverse (210211032232122), we get a palindrome (431443262344134).

The spelling of 221232230112012 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, two hundred thirty million, one hundred twelve thousand, twelve".