1213405320289 has 2 divisors, whose sum is σ = 1213405320290. Its totient is φ = 1213405320288.

The previous prime is 1213405320277. The next prime is 1213405320331. The reversal of 1213405320289 is 9820235043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 639667243264 + 573738077025 = 799792^2 + 757455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213405320289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213405320089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606702660144 + 606702660145.

It is an arithmetic number, because the mean of its divisors is an integer number (606702660145).

Almost surely, 2^{1213405320289} is an apocalyptic number.

It is an amenable number.

1213405320289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213405320289 is an equidigital number, since it uses as much as digits as its factorization.

1213405320289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 1213405320289 in words is "one trillion, two hundred thirteen billion, four hundred five million, three hundred twenty thousand, two hundred eighty-nine".