211641309361 has 4 divisors (see below), whose sum is σ = 211833188352. Its totient is φ = 211449430372.

The previous prime is 211641309343. The next prime is 211641309421. The reversal of 211641309361 is 163903146112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211641309361 - 2⁵ = 211641309329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211641309361.

It is not an unprimeable number, because it can be changed into a prime (211641309331) 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 in 3 ways as a sum of consecutive naturals, for example, 95937841 + ... + 95940046.

It is an arithmetic number, because the mean of its divisors is an integer number (52958297088).

Almost surely, 2^211641309361 is an apocalyptic number.

It is an amenable number.

211641309361 is a deficient number, since it is larger than the sum of its proper divisors (191878991).

211641309361 is a wasteful number, since it uses less digits than its factorization.

211641309361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191878990.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 211641309361 in words is "two hundred eleven billion, six hundred forty-one million, three hundred nine thousand, three hundred sixty-one".