1221322244 has 12 divisors (see below), whose sum is σ = 2144144604. Its totient is φ = 608709504.

The previous prime is 1221322231. The next prime is 1221322253. The reversal of 1221322244 is 4422231221.

It can be written as a sum of positive squares in 2 ways, for example, as 30382144 + 1190940100 = 5512^2 + 34510^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486497 + ... + 489000.

It is an arithmetic number, because the mean of its divisors is an integer number (178678717).

Almost surely, 2^1221322244 is an apocalyptic number.

It is an amenable number.

1221322244 is a deficient number, since it is larger than the sum of its proper divisors (922822360).

1221322244 is a wasteful number, since it uses less digits than its factorization.

1221322244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975814 (or 975812 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 1221322244 is about 34947.4211351854. The cubic root of 1221322244 is about 1068.9156172829.

Adding to 1221322244 its reverse (4422231221), we get a palindrome (5643553465).

The spelling of 1221322244 in words is "one billion, two hundred twenty-one million, three hundred twenty-two thousand, two hundred forty-four".