211404324161 has 2 divisors, whose sum is σ = 211404324162. Its totient is φ = 211404324160.

The previous prime is 211404324139. The next prime is 211404324181. The reversal of 211404324161 is 161423404112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151321000000 + 60083324161 = 389000^2 + 245119^2 .

It is a cyclic number.

It is not a de Polignac number, because 211404324161 - 2¹⁸ = 211404062017 is a prime.

It is not a weakly prime, because it can be changed into another prime (211404324181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105702162080 + 105702162081.

It is an arithmetic number, because the mean of its divisors is an integer number (105702162081).

Almost surely, 2^211404324161 is an apocalyptic number.

It is an amenable number.

211404324161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211404324161 is an equidigital number, since it uses as much as digits as its factorization.

211404324161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 211404324161 its reverse (161423404112), we get a palindrome (372827728273).

The spelling of 211404324161 in words is "two hundred eleven billion, four hundred four million, three hundred twenty-four thousand, one hundred sixty-one".