210210043120109 has 2 divisors, whose sum is σ = 210210043120110. Its totient is φ = 210210043120108.

The previous prime is 210210043120073. The next prime is 210210043120123. The reversal of 210210043120109 is 901021340012012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149184605233225 + 61025437886884 = 12214115^2 + 7811878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210210043120109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210210042120109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105105021560054 + 105105021560055.

It is an arithmetic number, because the mean of its divisors is an integer number (105105021560055).

Almost surely, 2^{210210043120109} is an apocalyptic number.

It is an amenable number.

210210043120109 is a deficient number, since it is larger than the sum of its proper divisors (1).

210210043120109 is an equidigital number, since it uses as much as digits as its factorization.

210210043120109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 210210043120109 in words is "two hundred ten trillion, two hundred ten billion, forty-three million, one hundred twenty thousand, one hundred nine".