1312221211061 has 2 divisors, whose sum is σ = 1312221211062. Its totient is φ = 1312221211060.

The previous prime is 1312221211043. The next prime is 1312221211121. The reversal of 1312221211061 is 1601121222131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299871334161 + 12349876900 = 1140119^2 + 111130^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312221211061 - 2¹⁰ = 1312221210037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312221211001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656110605530 + 656110605531.

It is an arithmetic number, because the mean of its divisors is an integer number (656110605531).

Almost surely, 2^{1312221211061} is an apocalyptic number.

It is an amenable number.

1312221211061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312221211061 is an equidigital number, since it uses as much as digits as its factorization.

1312221211061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 1312221211061 its reverse (1601121222131), we get a palindrome (2913342433192).

The spelling of 1312221211061 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, sixty-one".