1221222233322 has 512 divisors, whose sum is σ = 3533626736640. Its totient is φ = 304044088320.

The previous prime is 1221222233299. The next prime is 1221222233333. The reversal of 1221222233322 is 2233322221221.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

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 255 ways as a sum of consecutive naturals, for example, 1415089063 + ... + 1415089925.

It is an arithmetic number, because the mean of its divisors is an integer number (6901614720).

Almost surely, 2^{1221222233322} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221222233322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1766813368320).

1221222233322 is an abundant number, since it is smaller than the sum of its proper divisors (2312404503318).

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

1221222233322 is a wasteful number, since it uses less digits than its factorization.

1221222233322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1149 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 1221222233322 its reverse (2233322221221), we get a palindrome (3454544454543).

The spelling of 1221222233322 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, three hundred twenty-two".