1312201105231 has 2 divisors, whose sum is σ = 1312201105232. Its totient is φ = 1312201105230.

The previous prime is 1312201105199. The next prime is 1312201105261. The reversal of 1312201105231 is 1325011022131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312201105231 - 2⁵ = 1312201105199 is a prime.

It is a super-2 number, since 2×1312201105231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312201105261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656100552615 + 656100552616.

It is an arithmetic number, because the mean of its divisors is an integer number (656100552616).

Almost surely, 2^{1312201105231} is an apocalyptic number.

1312201105231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312201105231 is an equidigital number, since it uses as much as digits as its factorization.

1312201105231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 1312201105231 its reverse (1325011022131), we get a palindrome (2637212127362).

The spelling of 1312201105231 in words is "one trillion, three hundred twelve billion, two hundred one million, one hundred five thousand, two hundred thirty-one".