211668412612 has 12 divisors (see below), whose sum is σ = 370751350060. Its totient is φ = 105739455456.

The previous prime is 211668412507. The next prime is 211668412621. The reversal of 211668412612 is 216214866112.

It can be written as a sum of positive squares in 2 ways, for example, as 58594980096 + 153073432516 = 242064^2 + 391246^2 .

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, 23682687 + ... + 23691622.

Almost surely, 2^211668412612 is an apocalyptic number.

It is an amenable number.

211668412612 is a deficient number, since it is larger than the sum of its proper divisors (159082937448).

211668412612 is a wasteful number, since it uses less digits than its factorization.

211668412612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47375430 (or 47375428 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The spelling of 211668412612 in words is "two hundred eleven billion, six hundred sixty-eight million, four hundred twelve thousand, six hundred twelve".