1101000999809 has 2 divisors, whose sum is σ = 1101000999810. Its totient is φ = 1101000999808.

The previous prime is 1101000999799. The next prime is 1101000999841. The reversal of 1101000999809 is 9089990001011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843774519184 + 257226480625 = 918572^2 + 507175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101000999809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101000999869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550500499904 + 550500499905.

It is an arithmetic number, because the mean of its divisors is an integer number (550500499905).

Almost surely, 2^{1101000999809} is an apocalyptic number.

It is an amenable number.

1101000999809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101000999809 is an equidigital number, since it uses as much as digits as its factorization.

1101000999809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 47.

The spelling of 1101000999809 in words is "one trillion, one hundred one billion, nine hundred ninety-nine thousand, eight hundred nine".