1221312333222 has 12 divisors (see below), whose sum is σ = 2646176722020. Its totient is φ = 407104111068.

The previous prime is 1221312333203. The next prime is 1221312333259. The reversal of 1221312333222 is 2223332131221.

1221312333222 is a `hidden beast` number, since 1 + 2 + 21 + 312 + 3 + 3 + 322 + 2 = 666.

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33925342572 + ... + 33925342607.

It is an arithmetic number, because the mean of its divisors is an integer number (220514726835).

Almost surely, 2^{1221312333222} is an apocalyptic number.

1221312333222 is an abundant number, since it is smaller than the sum of its proper divisors (1424864388798).

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

1221312333222 is a wasteful number, since it uses less digits than its factorization.

1221312333222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67850685187 (or 67850685184 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 1221312333222 its reverse (2223332131221), we get a palindrome (3444644464443).

The spelling of 1221312333222 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, three hundred thirty-three thousand, two hundred twenty-two".