1331311222 has 4 divisors (see below), whose sum is σ = 1996966836. Its totient is φ = 665655610.

The previous prime is 1331311193. The next prime is 1331311243. The reversal of 1331311222 is 2221131331.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1331311222.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 332827804 + ... + 332827807.

It is an arithmetic number, because the mean of its divisors is an integer number (499241709).

Almost surely, 2^1331311222 is an apocalyptic number.

1331311222 is a deficient number, since it is larger than the sum of its proper divisors (665655614).

1331311222 is an equidigital number, since it uses as much as digits as its factorization.

1331311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665655613.

The product of its digits is 216, while the sum is 19.

The square root of 1331311222 is about 36487.1377611344. The cubic root of 1331311222 is about 1100.0857294066.

Adding to 1331311222 its reverse (2221131331), we get a palindrome (3552442553).

The spelling of 1331311222 in words is "one billion, three hundred thirty-one million, three hundred eleven thousand, two hundred twenty-two".