205100012 has 12 divisors (see below), whose sum is σ = 386534736. Its totient is φ = 94661520.

The previous prime is 205100011. The next prime is 205100069. The reversal of 205100012 is 210001502.

It is a junction number, because it is equal to n+sod(n) for n = 205099966 and 205100002.

It is not an unprimeable number, because it can be changed into a prime (205100011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972064 + ... + 1972167.

It is an arithmetic number, because the mean of its divisors is an integer number (32211228).

Almost surely, 2^205100012 is an apocalyptic number.

It is an amenable number.

205100012 is a deficient number, since it is larger than the sum of its proper divisors (181434724).

205100012 is a wasteful number, since it uses less digits than its factorization.

205100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944248 (or 3944246 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 205100012 is about 14321.3132079429. The cubic root of 205100012 is about 589.7327258243.

Adding to 205100012 its reverse (210001502), we get a palindrome (415101514).

The spelling of 205100012 in words is "two hundred five million, one hundred thousand, twelve".