109142052497209 has 2 divisors, whose sum is σ = 109142052497210. Its totient is φ = 109142052497208.

The previous prime is 109142052497197. The next prime is 109142052497243. The reversal of 109142052497209 is 902794250241901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95200454013184 + 13941598484025 = 9757072^2 + 3733845^2 .

It is a cyclic number.

It is not a de Polignac number, because 109142052497209 - 2⁷ = 109142052497081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 109142052497209.

It is not a weakly prime, because it can be changed into another prime (109142052497279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54571026248604 + 54571026248605.

It is an arithmetic number, because the mean of its divisors is an integer number (54571026248605).

Almost surely, 2^{109142052497209} is an apocalyptic number.

It is an amenable number.

109142052497209 is a deficient number, since it is larger than the sum of its proper divisors (1).

109142052497209 is an equidigital number, since it uses as much as digits as its factorization.

109142052497209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 109142052497209 in words is "one hundred nine trillion, one hundred forty-two billion, fifty-two million, four hundred ninety-seven thousand, two hundred nine".