210111221000609 has 2 divisors, whose sum is σ = 210111221000610. Its totient is φ = 210111221000608.

The previous prime is 210111221000587. The next prime is 210111221000663. The reversal of 210111221000609 is 906000122111012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202431089597584 + 7680131403025 = 14227828^2 + 2771305^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111221000609 - 2¹² = 210111220996513 is a prime.

It is not a weakly prime, because it can be changed into another prime (210111221000699) 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, 105055610500304 + 105055610500305.

It is an arithmetic number, because the mean of its divisors is an integer number (105055610500305).

Almost surely, 2^{210111221000609} is an apocalyptic number.

It is an amenable number.

210111221000609 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111221000609 is an equidigital number, since it uses as much as digits as its factorization.

210111221000609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 210111221000609 in words is "two hundred ten trillion, one hundred eleven billion, two hundred twenty-one million, six hundred nine", and thus it is an aban number.