1811100099973 has 2 divisors, whose sum is σ = 1811100099974. Its totient is φ = 1811100099972.

The previous prime is 1811100099943. The next prime is 1811100100021. The reversal of 1811100099973 is 3799900011181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1703711499169 + 107388600804 = 1305263^2 + 327702^2 .

It is a cyclic number.

It is not a de Polignac number, because 1811100099973 - 2⁹ = 1811100099461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1811100099943) 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, 905550049986 + 905550049987.

It is an arithmetic number, because the mean of its divisors is an integer number (905550049987).

Almost surely, 2^{1811100099973} is an apocalyptic number.

It is an amenable number.

1811100099973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1811100099973 is an equidigital number, since it uses as much as digits as its factorization.

1811100099973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 49.

The spelling of 1811100099973 in words is "one trillion, eight hundred eleven billion, one hundred million, ninety-nine thousand, nine hundred seventy-three".