211670612161 has 8 divisors (see below), whose sum is σ = 214041432384. Its totient is φ = 209305864560.

The previous prime is 211670612159. The next prime is 211670612173. The reversal of 211670612161 is 161216076112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211670612161 - 2¹ = 211670612159 is a prime.

It is a super-2 number, since 2×211670612161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211670612141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1448035 + ... + 1587496.

It is an arithmetic number, because the mean of its divisors is an integer number (26755179048).

Almost surely, 2^211670612161 is an apocalyptic number.

It is an amenable number.

211670612161 is a deficient number, since it is larger than the sum of its proper divisors (2370820223).

211670612161 is a wasteful number, since it uses less digits than its factorization.

211670612161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036311.

The product of its (nonzero) digits is 6048, while the sum is 34.

Adding to 211670612161 its reverse (161216076112), we get a palindrome (372886688273).

The spelling of 211670612161 in words is "two hundred eleven billion, six hundred seventy million, six hundred twelve thousand, one hundred sixty-one".