223001221 has 2 divisors, whose sum is σ = 223001222. Its totient is φ = 223001220.

The previous prime is 223001171. The next prime is 223001237. The reversal of 223001221 is 122100322.

223001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127938721 + 95062500 = 11311^2 + 9750^2 .

It is a cyclic number.

It is not a de Polignac number, because 223001221 - 2¹⁵ = 222968453 is a prime.

223001221 is a modest number, since divided by 1221 gives 223 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223001521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111500610 + 111500611.

It is an arithmetic number, because the mean of its divisors is an integer number (111500611).

Almost surely, 2^223001221 is an apocalyptic number.

It is an amenable number.

223001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223001221 is an equidigital number, since it uses as much as digits as its factorization.

223001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 223001221 is about 14933.2254051159. The cubic root of 223001221 is about 606.4138062198.

Adding to 223001221 its reverse (122100322), we get a palindrome (345101543).

The spelling of 223001221 in words is "two hundred twenty-three million, one thousand, two hundred twenty-one".