1113223203221 has 2 divisors, whose sum is σ = 1113223203222. Its totient is φ = 1113223203220.

The previous prime is 1113223203217. The next prime is 1113223203223. The reversal of 1113223203221 is 1223023223111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632842524196 + 480380679025 = 795514^2 + 693095^2 .

It is an emirp because it is prime and its reverse (1223023223111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1113223203221 - 2² = 1113223203217 is a prime.

Together with 1113223203223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1113223203223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556611601610 + 556611601611.

It is an arithmetic number, because the mean of its divisors is an integer number (556611601611).

Almost surely, 2^{1113223203221} is an apocalyptic number.

It is an amenable number.

1113223203221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1113223203221 is an equidigital number, since it uses as much as digits as its factorization.

1113223203221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1113223203221 its reverse (1223023223111), we get a palindrome (2336246426332).

The spelling of 1113223203221 in words is "one trillion, one hundred thirteen billion, two hundred twenty-three million, two hundred three thousand, two hundred twenty-one".