223123322221 has 2 divisors, whose sum is σ = 223123322222. Its totient is φ = 223123322220.

The previous prime is 223123322137. The next prime is 223123322249. The reversal of 223123322221 is 122223321322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139512708196 + 83610614025 = 373514^2 + 289155^2 .

It is a cyclic number.

It is not a de Polignac number, because 223123322221 - 2¹⁵ = 223123289453 is a prime.

It is a super-3 number, since 3×223123322221³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223123322251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111561661110 + 111561661111.

It is an arithmetic number, because the mean of its divisors is an integer number (111561661111).

Almost surely, 2^223123322221 is an apocalyptic number.

It is an amenable number.

223123322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223123322221 is an equidigital number, since it uses as much as digits as its factorization.

223123322221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 25.

Adding to 223123322221 its reverse (122223321322), we get a palindrome (345346643543).

The spelling of 223123322221 in words is "two hundred twenty-three billion, one hundred twenty-three million, three hundred twenty-two thousand, two hundred twenty-one".