1223006321 has 4 divisors (see below), whose sum is σ = 1229763444. Its totient is φ = 1216249200.

The previous prime is 1223006243. The next prime is 1223006381. The reversal of 1223006321 is 1236003221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 571735921 + 651270400 = 23911^2 + 25520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223006321 - 2²² = 1218812017 is a prime.

It is a super-2 number, since 2×1223006321² = 2991488922411910082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223006293 and 1223006302.

It is not an unprimeable number, because it can be changed into a prime (1223006381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3378290 + ... + 3378651.

It is an arithmetic number, because the mean of its divisors is an integer number (307440861).

Almost surely, 2^1223006321 is an apocalyptic number.

It is an amenable number.

1223006321 is a deficient number, since it is larger than the sum of its proper divisors (6757123).

1223006321 is an equidigital number, since it uses as much as digits as its factorization.

1223006321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6757122.

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

The square root of 1223006321 is about 34971.5072737793. The cubic root of 1223006321 is about 1069.4066996453.

Adding to 1223006321 its reverse (1236003221), we get a palindrome (2459009542).

The spelling of 1223006321 in words is "one billion, two hundred twenty-three million, six thousand, three hundred twenty-one".