12223111104821 has 2 divisors, whose sum is σ = 12223111104822. Its totient is φ = 12223111104820.

The previous prime is 12223111104797. The next prime is 12223111104829. The reversal of 12223111104821 is 12840111132221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7865141724196 + 4357969380625 = 2804486^2 + 2087575^2 .

It is an emirp because it is prime and its reverse (12840111132221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12223111104821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12223111104829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111555552410 + 6111555552411.

It is an arithmetic number, because the mean of its divisors is an integer number (6111555552411).

Almost surely, 2^{12223111104821} is an apocalyptic number.

It is an amenable number.

12223111104821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223111104821 is an equidigital number, since it uses as much as digits as its factorization.

12223111104821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 29.

The spelling of 12223111104821 in words is "twelve trillion, two hundred twenty-three billion, one hundred eleven million, one hundred four thousand, eight hundred twenty-one".