1206506327321 has 2 divisors, whose sum is σ = 1206506327322. Its totient is φ = 1206506327320.

The previous prime is 1206506327291. The next prime is 1206506327347. The reversal of 1206506327321 is 1237236056021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1031719621696 + 174786705625 = 1015736^2 + 418075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206506327321 - 2¹⁴ = 1206506310937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1206506326321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603253163660 + 603253163661.

It is an arithmetic number, because the mean of its divisors is an integer number (603253163661).

Almost surely, 2^{1206506327321} is an apocalyptic number.

It is an amenable number.

1206506327321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206506327321 is an equidigital number, since it uses as much as digits as its factorization.

1206506327321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 1206506327321 in words is "one trillion, two hundred six billion, five hundred six million, three hundred twenty-seven thousand, three hundred twenty-one".