211315312240161 has 4 divisors (see below), whose sum is σ = 281753749653552. Its totient is φ = 140876874826772.

The previous prime is 211315312240129. The next prime is 211315312240177. The reversal of 211315312240161 is 161042213513112.

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 211315312240161 - 2⁵ = 211315312240129 is a prime.

It is a super-2 number, since 2×211315312240161² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211315312240861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35219218706691 + ... + 35219218706696.

It is an arithmetic number, because the mean of its divisors is an integer number (70438437413388).

Almost surely, 2^{211315312240161} is an apocalyptic number.

It is an amenable number.

211315312240161 is a deficient number, since it is larger than the sum of its proper divisors (70438437413391).

211315312240161 is an equidigital number, since it uses as much as digits as its factorization.

211315312240161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70438437413390.

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 211315312240161 its reverse (161042213513112), we get a palindrome (372357525753273).

The spelling of 211315312240161 in words is "two hundred eleven trillion, three hundred fifteen billion, three hundred twelve million, two hundred forty thousand, one hundred sixty-one".