212123171 has 16 divisors (see below), whose sum is σ = 235339104. Its totient is φ = 189955584.

The previous prime is 212123159. The next prime is 212123203. The reversal of 212123171 is 171321212.

212123171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212123171 - 2¹⁴ = 212106787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212123071) 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, 86555 + ... + 88971.

It is an arithmetic number, because the mean of its divisors is an integer number (14708694).

Almost surely, 2^212123171 is an apocalyptic number.

212123171 is a deficient number, since it is larger than the sum of its proper divisors (23215933).

212123171 is a wasteful number, since it uses less digits than its factorization.

212123171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630.

The product of its digits is 168, while the sum is 20.

The square root of 212123171 is about 14564.4488738847. The cubic root of 212123171 is about 596.3886507224.

Adding to 212123171 its reverse (171321212), we get a palindrome (383444383).

The spelling of 212123171 in words is "two hundred twelve million, one hundred twenty-three thousand, one hundred seventy-one".