2171162116217 has 16 divisors (see below), whose sum is σ = 2421247738752. Its totient is φ = 1936333850880.

The previous prime is 2171162116187. The next prime is 2171162116219. The reversal of 2171162116217 is 7126112611712.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2171162116217 - 2⁶ = 2171162116153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171162116219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25906034 + ... + 25989707.

It is an arithmetic number, because the mean of its divisors is an integer number (151327983672).

Almost surely, 2^{2171162116217} is an apocalyptic number.

It is an amenable number.

2171162116217 is a deficient number, since it is larger than the sum of its proper divisors (250085622535).

2171162116217 is a wasteful number, since it uses less digits than its factorization.

2171162116217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51895888.

The product of its digits is 14112, while the sum is 38.

Adding to 2171162116217 its reverse (7126112611712), we get a palindrome (9297274727929).

The spelling of 2171162116217 in words is "two trillion, one hundred seventy-one billion, one hundred sixty-two million, one hundred sixteen thousand, two hundred seventeen".