1212221003322 has 128 divisors (see below), whose sum is σ = 3044265062400. Its totient is φ = 313767945216.

The previous prime is 1212221003317. The next prime is 1212221003347. The reversal of 1212221003322 is 2233001222121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 93176754 + ... + 93189762.

It is an arithmetic number, because the mean of its divisors is an integer number (23783320800).

Almost surely, 2^{1212221003322} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212221003322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1522132531200).

1212221003322 is an abundant number, since it is smaller than the sum of its proper divisors (1832044059078).

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

1212221003322 is a wasteful number, since it uses less digits than its factorization.

1212221003322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18140.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1212221003322 its reverse (2233001222121), we get a palindrome (3445222225443).

The spelling of 1212221003322 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, three thousand, three hundred twenty-two".