1213312108 has 24 divisors (see below), whose sum is σ = 2272939200. Its totient is φ = 564983568.

The previous prime is 1213312081. The next prime is 1213312109. The reversal of 1213312108 is 8012133121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1213312109) 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 7 ways as a sum of consecutive naturals, for example, 130810 + ... + 139777.

It is an arithmetic number, because the mean of its divisors is an integer number (94705800).

Almost surely, 2^1213312108 is an apocalyptic number.

It is an amenable number.

1213312108 is a deficient number, since it is larger than the sum of its proper divisors (1059627092).

1213312108 is a wasteful number, since it uses less digits than its factorization.

1213312108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270669 (or 270667 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1213312108 is about 34832.6299322919. The cubic root of 1213312108 is about 1066.5736346379.

Adding to 1213312108 its reverse (8012133121), we get a palindrome (9225445229).

The spelling of 1213312108 in words is "one billion, two hundred thirteen million, three hundred twelve thousand, one hundred eight".