1222213321 has 12 divisors (see below), whose sum is σ = 1456437780. Its totient is φ = 1022058240.

The previous prime is 1222213313. The next prime is 1222213339. The reversal of 1222213321 is 1233122221.

It can be written as a sum of positive squares in 2 ways, for example, as 608164921 + 614048400 = 24661^2 + 24780^2 .

It is not a de Polignac number, because 1222213321 - 2³ = 1222213313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222213301) 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 11 ways as a sum of consecutive naturals, for example, 302176 + ... + 306193.

It is an arithmetic number, because the mean of its divisors is an integer number (121369815).

Almost surely, 2^1222213321 is an apocalyptic number.

It is an amenable number.

1222213321 is a deficient number, since it is larger than the sum of its proper divisors (234224459).

1222213321 is an equidigital number, since it uses as much as digits as its factorization.

1222213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608424 (or 608417 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 1222213321 is about 34960.1676340375. The cubic root of 1222213321 is about 1069.1755144490.

Adding to 1222213321 its reverse (1233122221), we get a palindrome (2455335542).

The spelling of 1222213321 in words is "one billion, two hundred twenty-two million, two hundred thirteen thousand, three hundred twenty-one".