120420321409 has 2 divisors, whose sum is σ = 120420321410. Its totient is φ = 120420321408.

The previous prime is 120420321379. The next prime is 120420321467. The reversal of 120420321409 is 904123024021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93819690000 + 26600631409 = 306300^2 + 163097^2 .

It is a cyclic number.

It is not a de Polignac number, because 120420321409 - 2¹³ = 120420313217 is a prime.

It is not a weakly prime, because it can be changed into another prime (120420321509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60210160704 + 60210160705.

It is an arithmetic number, because the mean of its divisors is an integer number (60210160705).

Almost surely, 2^120420321409 is an apocalyptic number.

It is an amenable number.

120420321409 is a deficient number, since it is larger than the sum of its proper divisors (1).

120420321409 is an equidigital number, since it uses as much as digits as its factorization.

120420321409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 120420321409 in words is "one hundred twenty billion, four hundred twenty million, three hundred twenty-one thousand, four hundred nine".