1331312212 has 12 divisors (see below), whose sum is σ = 2350414836. Its totient is φ = 659765120.

The previous prime is 1331312201. The next prime is 1331312221. The reversal of 1331312212 is 2122131331.

It can be written as a sum of positive squares in 2 ways, for example, as 43507216 + 1287804996 = 6596^2 + 35886^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1331312212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1472239 + ... + 1473142.

It is an arithmetic number, because the mean of its divisors is an integer number (195867903).

Almost surely, 2^1331312212 is an apocalyptic number.

It is an amenable number.

1331312212 is a deficient number, since it is larger than the sum of its proper divisors (1019102624).

1331312212 is a wasteful number, since it uses less digits than its factorization.

1331312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945498 (or 2945496 counting only the distinct ones).

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

The square root of 1331312212 is about 36487.1513275564. The cubic root of 1331312212 is about 1100.0860020913.

Adding to 1331312212 its reverse (2122131331), we get a palindrome (3453443543).

The spelling of 1331312212 in words is "one billion, three hundred thirty-one million, three hundred twelve thousand, two hundred twelve".