161206211212 has 12 divisors (see below), whose sum is σ = 282246319096. Its totient is φ = 80564405760.

The previous prime is 161206211209. The next prime is 161206211233. The reversal of 161206211212 is 212112602161.

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, 9665589 + ... + 9682252.

Almost surely, 2^161206211212 is an apocalyptic number.

It is an amenable number.

161206211212 is a deficient number, since it is larger than the sum of its proper divisors (121040107884).

161206211212 is a wasteful number, since it uses less digits than its factorization.

161206211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19349928 (or 19349926 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 161206211212 its reverse (212112602161), we get a palindrome (373318813373).

The spelling of 161206211212 in words is "one hundred sixty-one billion, two hundred six million, two hundred eleven thousand, two hundred twelve".