1223023221 has 24 divisors (see below), whose sum is σ = 2052063104. Its totient is φ = 687411360.

The previous prime is 1223023201. The next prime is 1223023247. The reversal of 1223023221 is 1223203221.

It is not a de Polignac number, because 1223023221 - 2¹⁰ = 1223022197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223023194 and 1223023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223023201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155281 + ... + 162966.

Almost surely, 2^1223023221 is an apocalyptic number.

It is an amenable number.

1223023221 is a deficient number, since it is larger than the sum of its proper divisors (829039883).

1223023221 is a wasteful number, since it uses less digits than its factorization.

1223023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318321 (or 318318 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1223023221 is about 34971.7488982178. The cubic root of 1223023221 is about 1069.4116254552.

Adding to 1223023221 its reverse (1223203221), we get a palindrome (2446226442).

The spelling of 1223023221 in words is "one billion, two hundred twenty-three million, twenty-three thousand, two hundred twenty-one".