211401154545697 has 2 divisors, whose sum is σ = 211401154545698. Its totient is φ = 211401154545696.

The previous prime is 211401154545673. The next prime is 211401154545709. The reversal of 211401154545697 is 796545451104112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211014001795041 + 387152750656 = 14526321^2 + 622216^2 .

It is a cyclic number.

It is not a de Polignac number, because 211401154545697 - 2¹⁵ = 211401154512929 is a prime.

It is a super-2 number, since 2×211401154545697² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211401154545617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105700577272848 + 105700577272849.

It is an arithmetic number, because the mean of its divisors is an integer number (105700577272849).

Almost surely, 2^{211401154545697} is an apocalyptic number.

It is an amenable number.

211401154545697 is a deficient number, since it is larger than the sum of its proper divisors (1).

211401154545697 is an equidigital number, since it uses as much as digits as its factorization.

211401154545697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048000, while the sum is 55.

The spelling of 211401154545697 in words is "two hundred eleven trillion, four hundred one billion, one hundred fifty-four million, five hundred forty-five thousand, six hundred ninety-seven".