211209000193 has 2 divisors, whose sum is σ = 211209000194. Its totient is φ = 211209000192.

The previous prime is 211209000187. The next prime is 211209000227. The reversal of 211209000193 is 391000902112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210985886224 + 223113969 = 459332^2 + 14937^2 .

It is a cyclic number.

It is not a de Polignac number, because 211209000193 - 2⁹ = 211208999681 is a prime.

It is not a weakly prime, because it can be changed into another prime (211209000133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105604500096 + 105604500097.

It is an arithmetic number, because the mean of its divisors is an integer number (105604500097).

Almost surely, 2^211209000193 is an apocalyptic number.

It is an amenable number.

211209000193 is a deficient number, since it is larger than the sum of its proper divisors (1).

211209000193 is an equidigital number, since it uses as much as digits as its factorization.

211209000193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 211209000193 in words is "two hundred eleven billion, two hundred nine million, one hundred ninety-three", and thus it is an aban number.