1221312333223 has 8 divisors (see below), whose sum is σ = 1263543461280. Its totient is φ = 1179088999200.

The previous prime is 1221312333203. The next prime is 1221312333259. The reversal of 1221312333223 is 3223332131221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221312333223 - 2⁵ = 1221312333191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221312333191 and 1221312333200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221312333203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1628803 + ... + 2257348.

It is an arithmetic number, because the mean of its divisors is an integer number (157942932660).

Almost surely, 2^{1221312333223} is an apocalyptic number.

1221312333223 is a deficient number, since it is larger than the sum of its proper divisors (42231128057).

1221312333223 is a wasteful number, since it uses less digits than its factorization.

1221312333223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897017.

The product of its digits is 7776, while the sum is 28.

Adding to 1221312333223 its reverse (3223332131221), we get a palindrome (4444644464444).

The spelling of 1221312333223 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, three hundred thirty-three thousand, two hundred twenty-three".