1222111221222 has 64 divisors (see below), whose sum is σ = 2666440603584. Its totient is φ = 371852881920.

The previous prime is 1222111221209. The next prime is 1222111221301. The reversal of 1222111221222 is 2221221112221.

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

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 31 ways as a sum of consecutive naturals, for example, 663972 + ... + 1698552.

It is an arithmetic number, because the mean of its divisors is an integer number (41663134431).

Almost surely, 2^{1222111221222} is an apocalyptic number.

1222111221222 is an abundant number, since it is smaller than the sum of its proper divisors (1444329382362).

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

1222111221222 is a wasteful number, since it uses less digits than its factorization.

1222111221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034953.

The product of its digits is 256, while the sum is 21.

Adding to 1222111221222 its reverse (2221221112221), we get a palindrome (3443332333443).

The spelling of 1222111221222 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twenty-two".