211309897995311 has 2 divisors, whose sum is σ = 211309897995312. Its totient is φ = 211309897995310.

The previous prime is 211309897995227. The next prime is 211309897995353. The reversal of 211309897995311 is 113599798903112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211309897995311 - 2²² = 211309893801007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211309897905311) 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, 105654948997655 + 105654948997656.

It is an arithmetic number, because the mean of its divisors is an integer number (105654948997656).

Almost surely, 2^{211309897995311} is an apocalyptic number.

211309897995311 is a deficient number, since it is larger than the sum of its proper divisors (1).

211309897995311 is an equidigital number, since it uses as much as digits as its factorization.

211309897995311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33067440, while the sum is 68.

The spelling of 211309897995311 in words is "two hundred eleven trillion, three hundred nine billion, eight hundred ninety-seven million, nine hundred ninety-five thousand, three hundred eleven".