212123170 has 16 divisors (see below), whose sum is σ = 436367808. Its totient is φ = 72727920.

The previous prime is 212123159. The next prime is 212123203. The reversal of 212123170 is 71321212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515096 + ... + 1515235.

It is an arithmetic number, because the mean of its divisors is an integer number (27272988).

Almost surely, 2^212123170 is an apocalyptic number.

212123170 is an abundant number, since it is smaller than the sum of its proper divisors (224244638).

212123170 is a wasteful number, since it uses less digits than its factorization.

212123170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030345.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 212123170 is about 14564.4488395545. The cubic root of 212123170 is about 596.3886497852.

Adding to 212123170 its reverse (71321212), we get a palindrome (283444382).

The spelling of 212123170 in words is "two hundred twelve million, one hundred twenty-three thousand, one hundred seventy".