1312303222121 has 2 divisors, whose sum is σ = 1312303222122. Its totient is φ = 1312303222120.

The previous prime is 1312303222117. The next prime is 1312303222169. The reversal of 1312303222121 is 1212223032131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816919514896 + 495383707225 = 903836^2 + 703835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312303222121 - 2² = 1312303222117 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312303222171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656151611060 + 656151611061.

It is an arithmetic number, because the mean of its divisors is an integer number (656151611061).

Almost surely, 2^{1312303222121} is an apocalyptic number.

It is an amenable number.

1312303222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312303222121 is an equidigital number, since it uses as much as digits as its factorization.

1312303222121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1312303222121 its reverse (1212223032131), we get a palindrome (2524526254252).

The spelling of 1312303222121 in words is "one trillion, three hundred twelve billion, three hundred three million, two hundred twenty-two thousand, one hundred twenty-one".