212172012170 has 8 divisors (see below), whose sum is σ = 381909621924. Its totient is φ = 84868804864.

The previous prime is 212172012161. The next prime is 212172012181. The reversal of 212172012170 is 71210271212.

It can be written as a sum of positive squares in 2 ways, for example, as 210571772161 + 1600240009 = 458881^2 + 40003^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10608600599 + ... + 10608600618.

Almost surely, 2^212172012170 is an apocalyptic number.

212172012170 is a deficient number, since it is larger than the sum of its proper divisors (169737609754).

212172012170 is a wasteful number, since it uses less digits than its factorization.

212172012170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21217201224.

The product of its (nonzero) digits is 784, while the sum is 26.

Adding to 212172012170 its reverse (71210271212), we get a palindrome (283382283382).

The spelling of 212172012170 in words is "two hundred twelve billion, one hundred seventy-two million, twelve thousand, one hundred seventy".