20120321222 has 16 divisors (see below), whose sum is σ = 30930681600.
Its totient is φ = 9810317760.
The previous prime is 20120321209. The next prime is 20120321231. The reversal of 20120321222 is 22212302102.
It is a self number, because there is not a number n which added to its sum of digits gives 20120321222.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128804 + ... + 238392.
It is an arithmetic number, because the mean of its divisors is an integer number (1933167600).
Almost surely, 220120321222 is an apocalyptic number.
20120321222 is a deficient number, since it is larger than the sum of its proper divisors (10810360378).
20120321222 is a wasteful number, since it uses less digits than its factorization.
20120321222 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 111871.
The product of its (nonzero) digits is 192, while the sum is 17.
Adding to 20120321222 its reverse (22212302102), we get a palindrome (42332623324).
The spelling of 20120321222 in words is "twenty billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-two".