217012171010 has 32 divisors (see below), whose sum is σ = 402028764480. Its totient is φ = 84305464768.

The previous prime is 217012170997. The next prime is 217012171039. The reversal of 217012171010 is 10171210712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2166797 + ... + 2264736.

It is an arithmetic number, because the mean of its divisors is an integer number (12563398890).

Almost surely, 2^217012171010 is an apocalyptic number.

217012171010 is a deficient number, since it is larger than the sum of its proper divisors (185016593470).

217012171010 is a wasteful number, since it uses less digits than its factorization.

217012171010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431682.

The product of its (nonzero) digits is 196, while the sum is 23.

Adding to 217012171010 its reverse (10171210712), we get a palindrome (227183381722).

The spelling of 217012171010 in words is "two hundred seventeen billion, twelve million, one hundred seventy-one thousand, ten".