1223221112321 has 8 divisors (see below), whose sum is σ = 1324674348480. Its totient is φ = 1122819205392.

The previous prime is 1223221112303. The next prime is 1223221112339. The reversal of 1223221112321 is 1232111223221.

It is an interprime number because it is at equal distance from previous prime (1223221112303) and next prime (1223221112339).

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 1223221112321 - 2¹⁸ = 1223220850177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223221112821) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 262829885 + ... + 262834538.

It is an arithmetic number, because the mean of its divisors is an integer number (165584293560).

Almost surely, 2^{1223221112321} is an apocalyptic number.

It is an amenable number.

1223221112321 is a deficient number, since it is larger than the sum of its proper divisors (101453236159).

1223221112321 is a wasteful number, since it uses less digits than its factorization.

1223221112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525664615.

The product of its digits is 576, while the sum is 23.

Adding to 1223221112321 its reverse (1232111223221), we get a palindrome (2455332335542).

The spelling of 1223221112321 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-one million, one hundred twelve thousand, three hundred twenty-one".