1223313221 has 8 divisors (see below), whose sum is σ = 1319571960. Its totient is φ = 1127362752.

The previous prime is 1223313199. The next prime is 1223313281. The reversal of 1223313221 is 1223133221.

It can be written as a sum of positive squares in 4 ways, for example, as 59752900 + 1163560321 = 7730^2 + 34111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223313221 - 2³⁰ = 149571397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223313193 and 1223313202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223313281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68786 + ... + 84723.

It is an arithmetic number, because the mean of its divisors is an integer number (164946495).

Almost surely, 2^1223313221 is an apocalyptic number.

It is an amenable number.

1223313221 is a deficient number, since it is larger than the sum of its proper divisors (96258739).

1223313221 is a wasteful number, since it uses less digits than its factorization.

1223313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154135.

The product of its digits is 432, while the sum is 20.

The square root of 1223313221 is about 34975.8948563150. The cubic root of 1223313221 is about 1069.4961441182.

Adding to 1223313221 its reverse (1223133221), we get a palindrome (2446446442).

The spelling of 1223313221 in words is "one billion, two hundred twenty-three million, three hundred thirteen thousand, two hundred twenty-one".