221424121312 has 48 divisors (see below), whose sum is σ = 451341026640. Its totient is φ = 106804268032.

The previous prime is 221424121301. The next prime is 221424121327. The reversal of 221424121312 is 213121424122.

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 7 ways as a sum of consecutive naturals, for example, 1007103 + ... + 1207105.

It is an arithmetic number, because the mean of its divisors is an integer number (9402938055).

Almost surely, 2^221424121312 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 221424121312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225670513320).

221424121312 is an abundant number, since it is smaller than the sum of its proper divisors (229916905328).

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

221424121312 is a wasteful number, since it uses less digits than its factorization.

221424121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201235 (or 201227 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

Adding to 221424121312 its reverse (213121424122), we get a palindrome (434545545434).

The spelling of 221424121312 in words is "two hundred twenty-one billion, four hundred twenty-four million, one hundred twenty-one thousand, three hundred twelve".