1311312212 has 12 divisors (see below), whose sum is σ = 2622624480. Its totient is φ = 561990936.

The previous prime is 1311312209. The next prime is 1311312257. The reversal of 1311312212 is 2122131131.

1311312212 is an admirable number.

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, 23416262 + ... + 23416317.

It is an arithmetic number, because the mean of its divisors is an integer number (218552040).

Almost surely, 2^1311312212 is an apocalyptic number.

It is an amenable number.

1311312212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311312212 is a wasteful number, since it uses less digits than its factorization.

1311312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46832590 (or 46832588 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1311312212 is about 36212.0451231355. The cubic root of 1311312212 is about 1094.5494033663.

Adding to 1311312212 its reverse (2122131131), we get a palindrome (3433443343).

The spelling of 1311312212 in words is "one billion, three hundred eleven million, three hundred twelve thousand, two hundred twelve".