1321441033309 has 2 divisors, whose sum is σ = 1321441033310. Its totient is φ = 1321441033308.

The previous prime is 1321441033243. The next prime is 1321441033321. The reversal of 1321441033309 is 9033301441231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249588622500 + 71852410809 = 1117850^2 + 268053^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321441033309 - 2¹⁵ = 1321441000541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321441033009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660720516654 + 660720516655.

It is an arithmetic number, because the mean of its divisors is an integer number (660720516655).

Almost surely, 2^{1321441033309} is an apocalyptic number.

It is an amenable number.

1321441033309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321441033309 is an equidigital number, since it uses as much as digits as its factorization.

1321441033309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 1321441033309 in words is "one trillion, three hundred twenty-one billion, four hundred forty-one million, thirty-three thousand, three hundred nine".