211268712836161 has 4 divisors (see below), whose sum is σ = 211268883424000. Its totient is φ = 211268542248324.

The previous prime is 211268712836149. The next prime is 211268712836171. The reversal of 211268712836161 is 161638217862112.

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 a de Polignac number, because none of the positive numbers 2^k-211268712836161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211268712836171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83422521 + ... + 85917718.

It is an arithmetic number, because the mean of its divisors is an integer number (52817220856000).

Almost surely, 2^{211268712836161} is an apocalyptic number.

It is an amenable number.

211268712836161 is a deficient number, since it is larger than the sum of its proper divisors (170587839).

211268712836161 is a wasteful number, since it uses less digits than its factorization.

211268712836161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170587838.

The product of its digits is 2322432, while the sum is 55.

The spelling of 211268712836161 in words is "two hundred eleven trillion, two hundred sixty-eight billion, seven hundred twelve million, eight hundred thirty-six thousand, one hundred sixty-one".