1312211313 has 16 divisors (see below), whose sum is σ = 2221733760. Its totient is φ = 749834928.

The previous prime is 1312211311. The next prime is 1312211323. The reversal of 1312211313 is 3131122131.

1312211313 is a `hidden beast` number, since 131 + 221 + 1 + 313 = 666.

It is not a de Polignac number, because 1312211313 - 2¹ = 1312211311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312211311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3471270 + ... + 3471647.

It is an arithmetic number, because the mean of its divisors is an integer number (138858360).

Almost surely, 2^1312211313 is an apocalyptic number.

It is an amenable number.

1312211313 is a deficient number, since it is larger than the sum of its proper divisors (909522447).

1312211313 is an equidigital number, since it uses as much as digits as its factorization.

1312211313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6942933 (or 6942927 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1312211313 is about 36224.4573872405. The cubic root of 1312211313 is about 1094.7995054196.

Adding to 1312211313 its reverse (3131122131), we get a palindrome (4443333444).

The spelling of 1312211313 in words is "one billion, three hundred twelve million, two hundred eleven thousand, three hundred thirteen".