1231321222 has 8 divisors (see below), whose sum is σ = 1872283176. Its totient is φ = 607226832.

The previous prime is 1231321219. The next prime is 1231321253. The reversal of 1231321222 is 2221231321.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1231321222.

It is a congruent number.

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, 4216708 + ... + 4216999.

It is an arithmetic number, because the mean of its divisors is an integer number (234035397).

Almost surely, 2^1231321222 is an apocalyptic number.

1231321222 is a deficient number, since it is larger than the sum of its proper divisors (640961954).

1231321222 is an equidigital number, since it uses as much as digits as its factorization.

1231321222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8433782.

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

The square root of 1231321222 is about 35090.1869758484. The cubic root of 1231321222 is about 1071.8247670385.

Adding to 1231321222 its reverse (2221231321), we get a palindrome (3452552543).

The spelling of 1231321222 in words is "one billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred twenty-two".