1312314121 has 4 divisors (see below), whose sum is σ = 1318975812. Its totient is φ = 1305652432.

The previous prime is 1312314071. The next prime is 1312314127. The reversal of 1312314121 is 1214132131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1214132131 = 73 ⋅16631947.

It can be written as a sum of positive squares in 2 ways, for example, as 837292096 + 475022025 = 28936^2 + 21795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312314121 - 2²¹ = 1310216969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312314127) 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, 3330550 + ... + 3330943.

It is an arithmetic number, because the mean of its divisors is an integer number (329743953).

Almost surely, 2^1312314121 is an apocalyptic number.

It is an amenable number.

1312314121 is a deficient number, since it is larger than the sum of its proper divisors (6661691).

1312314121 is an equidigital number, since it uses as much as digits as its factorization.

1312314121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6661690.

The product of its digits is 144, while the sum is 19.

The square root of 1312314121 is about 36225.8764007167. The cubic root of 1312314121 is about 1094.8280961421.

Adding to 1312314121 its reverse (1214132131), we get a palindrome (2526446252).

The spelling of 1312314121 in words is "one billion, three hundred twelve million, three hundred fourteen thousand, one hundred twenty-one".