20200111001009 has 2 divisors, whose sum is σ = 20200111001010. Its totient is φ = 20200111001008.

The previous prime is 20200111000999. The next prime is 20200111001023. The reversal of 20200111001009 is 90010011100202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18137138947984 + 2062972053025 = 4258772^2 + 1436305^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200111001009 - 2³² = 20195816033713 is a prime.

It is not a weakly prime, because it can be changed into another prime (20200111001039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100055500504 + 10100055500505.

It is an arithmetic number, because the mean of its divisors is an integer number (10100055500505).

Almost surely, 2^{20200111001009} is an apocalyptic number.

It is an amenable number.

20200111001009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200111001009 is an equidigital number, since it uses as much as digits as its factorization.

20200111001009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 20200111001009 in words is "twenty trillion, two hundred billion, one hundred eleven million, one thousand, nine".