1223033221 has 2 divisors, whose sum is σ = 1223033222. Its totient is φ = 1223033220.

The previous prime is 1223033213. The next prime is 1223033237. The reversal of 1223033221 is 1223303221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728460100 + 494573121 = 26990^2 + 22239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223033221 - 2³ = 1223033213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223033621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611516610 + 611516611.

It is an arithmetic number, because the mean of its divisors is an integer number (611516611).

Almost surely, 2^1223033221 is an apocalyptic number.

It is an amenable number.

1223033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223033221 is an equidigital number, since it uses as much as digits as its factorization.

1223033221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1223033221 is about 34971.8918704722. The cubic root of 1223033221 is about 1069.4145401143.

Adding to 1223033221 its reverse (1223303221), we get a palindrome (2446336442).

It can be divided in two parts, 12230 and 33221, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 1223033221 in words is "one billion, two hundred twenty-three million, thirty-three thousand, two hundred twenty-one".