1312211323 has 2 divisors, whose sum is σ = 1312211324. Its totient is φ = 1312211322.

The previous prime is 1312211311. The next prime is 1312211339. The reversal of 1312211323 is 3231122131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312211323 - 2¹³ = 1312203131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312211323.

It is not a weakly prime, because it can be changed into another prime (1312211353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656105661 + 656105662.

It is an arithmetic number, because the mean of its divisors is an integer number (656105662).

Almost surely, 2^1312211323 is an apocalyptic number.

1312211323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312211323 is an equidigital number, since it uses as much as digits as its factorization.

1312211323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1312211323 is about 36224.4575252688. The cubic root of 1312211323 is about 1094.7995082007.

Adding to 1312211323 its reverse (3231122131), we get a palindrome (4543333454).

The spelling of 1312211323 in words is "one billion, three hundred twelve million, two hundred eleven thousand, three hundred twenty-three".