211210208243 has 2 divisors, whose sum is σ = 211210208244. Its totient is φ = 211210208242.

The previous prime is 211210208227. The next prime is 211210208311. The reversal of 211210208243 is 342802012112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211210208243 - 2⁴ = 211210208227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (211210208743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605104121 + 105605104122.

It is an arithmetic number, because the mean of its divisors is an integer number (105605104122).

Almost surely, 2^211210208243 is an apocalyptic number.

211210208243 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210208243 is an equidigital number, since it uses as much as digits as its factorization.

211210208243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The spelling of 211210208243 in words is "two hundred eleven billion, two hundred ten million, two hundred eight thousand, two hundred forty-three".