166021106212 has 48 divisors (see below), whose sum is σ = 316272781440. Its totient is φ = 75796503552.

The previous prime is 166021106203. The next prime is 166021106227. The reversal of 166021106212 is 212601120661.

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, 11427489 + ... + 11442007.

It is an arithmetic number, because the mean of its divisors is an integer number (6589016280).

Almost surely, 2^166021106212 is an apocalyptic number.

It is an amenable number.

166021106212 is a deficient number, since it is larger than the sum of its proper divisors (150251675228).

166021106212 is a wasteful number, since it uses less digits than its factorization.

166021106212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16900 (or 16898 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 166021106212 its reverse (212601120661), we get a palindrome (378622226873).

The spelling of 166021106212 in words is "one hundred sixty-six billion, twenty-one million, one hundred six thousand, two hundred twelve".