1213312221349 has 2 divisors, whose sum is σ = 1213312221350. Its totient is φ = 1213312221348.

The previous prime is 1213312221301. The next prime is 1213312221367. The reversal of 1213312221349 is 9431222133121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 717717341124 + 495594880225 = 847182^2 + 703985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213312221349 - 2⁹ = 1213312220837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213312227349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606656110674 + 606656110675.

It is an arithmetic number, because the mean of its divisors is an integer number (606656110675).

Almost surely, 2^{1213312221349} is an apocalyptic number.

It is an amenable number.

1213312221349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213312221349 is an equidigital number, since it uses as much as digits as its factorization.

1213312221349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The spelling of 1213312221349 in words is "one trillion, two hundred thirteen billion, three hundred twelve million, two hundred twenty-one thousand, three hundred forty-nine".