20120120000809 has 2 divisors, whose sum is σ = 20120120000810. Its totient is φ = 20120120000808.

The previous prime is 20120120000759. The next prime is 20120120000833. The reversal of 20120120000809 is 90800002102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15361382809600 + 4758737191209 = 3919360^2 + 2181453^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120120000809 - 2⁷ = 20120120000681 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120120000879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060060000404 + 10060060000405.

It is an arithmetic number, because the mean of its divisors is an integer number (10060060000405).

Almost surely, 2^{20120120000809} is an apocalyptic number.

It is an amenable number.

20120120000809 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120120000809 is an equidigital number, since it uses as much as digits as its factorization.

20120120000809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 20120120000809 in words is "twenty trillion, one hundred twenty billion, one hundred twenty million, eight hundred nine", and thus it is an aban number.