205112155112 has 16 divisors (see below), whose sum is σ = 384592790340. Its totient is φ = 102554077696.

The previous prime is 205112155081. The next prime is 205112155121. The reversal of 205112155112 is 211551211502.

It can be written as a sum of positive squares in 2 ways, for example, as 190021015396 + 15091139716 = 435914^2 + 122846^2 .

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, 243128 + ... + 685080.

Almost surely, 2^205112155112 is an apocalyptic number.

It is an amenable number.

205112155112 is a deficient number, since it is larger than the sum of its proper divisors (179480635228).

205112155112 is a wasteful number, since it uses less digits than its factorization.

205112155112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499972 (or 499968 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 26.

Adding to 205112155112 its reverse (211551211502), we get a palindrome (416663366614).

The spelling of 205112155112 in words is "two hundred five billion, one hundred twelve million, one hundred fifty-five thousand, one hundred twelve".