1223221044 has 72 divisors (see below), whose sum is σ = 3005967328. Its totient is φ = 387031680.

The previous prime is 1223221037. The next prime is 1223221091. The reversal of 1223221044 is 4401223221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223221044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 614619 + ... + 616605.

Almost surely, 2^1223221044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223221044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1502983664).

1223221044 is an abundant number, since it is smaller than the sum of its proper divisors (1782746284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223221044 is a wasteful number, since it uses less digits than its factorization.

1223221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2082 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1223221044 is about 34974.5771096664. The cubic root of 1223221044 is about 1069.4692811637.

Adding to 1223221044 its reverse (4401223221), we get a palindrome (5624444265).

The spelling of 1223221044 in words is "one billion, two hundred twenty-three million, two hundred twenty-one thousand, forty-four".