1213312612 has 12 divisors (see below), whose sum is σ = 2123703036. Its totient is φ = 606540320.

The previous prime is 1213312609. The next prime is 1213312613. The reversal of 1213312612 is 2162133121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 445800996 + 767511616 = 21114^2 + 27704^2 .

It is not an unprimeable number, because it can be changed into a prime (1213312613) by changing a digit.

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, 2839 + ... + 49342.

It is an arithmetic number, because the mean of its divisors is an integer number (176975253).

Almost surely, 2^1213312612 is an apocalyptic number.

It is an amenable number.

1213312612 is a deficient number, since it is larger than the sum of its proper divisors (910390424).

1213312612 is a wasteful number, since it uses less digits than its factorization.

1213312612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57998 (or 57996 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1213312612 is about 34832.6371668870. The cubic root of 1213312612 is about 1066.5737823199.

Adding to 1213312612 its reverse (2162133121), we get a palindrome (3375445733).

The spelling of 1213312612 in words is "one billion, two hundred thirteen million, three hundred twelve thousand, six hundred twelve".