1331223212 has 12 divisors (see below), whose sum is σ = 2541426216. Its totient is φ = 605101440.

The previous prime is 1331223193. The next prime is 1331223241. The reversal of 1331223212 is 2123221331.

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 in 3 ways as a sum of consecutive naturals, for example, 15127493 + ... + 15127580.

It is an arithmetic number, because the mean of its divisors is an integer number (211785518).

Almost surely, 2^1331223212 is an apocalyptic number.

It is an amenable number.

1331223212 is a deficient number, since it is larger than the sum of its proper divisors (1210203004).

1331223212 is a wasteful number, since it uses less digits than its factorization.

1331223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30255088 (or 30255086 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1331223212 is about 36485.9316997661. The cubic root of 1331223212 is about 1100.0614874720.

Adding to 1331223212 its reverse (2123221331), we get a palindrome (3454444543).

The spelling of 1331223212 in words is "one billion, three hundred thirty-one million, two hundred twenty-three thousand, two hundred twelve".