205101115102 has 16 divisors (see below), whose sum is σ = 339398094672. Its totient is φ = 92353222080.

The previous prime is 205101115081. The next prime is 205101115139. The reversal of 205101115102 is 201511101502.

It is a self number, because there is not a number n which added to its sum of digits gives 205101115102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96200208 + ... + 96202339.

It is an arithmetic number, because the mean of its divisors is an integer number (21212380917).

Almost surely, 2^205101115102 is an apocalyptic number.

205101115102 is a deficient number, since it is larger than the sum of its proper divisors (134296979570).

205101115102 is a wasteful number, since it uses less digits than its factorization.

205101115102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192402603.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 205101115102 its reverse (201511101502), we get a palindrome (406612216604).

The spelling of 205101115102 in words is "two hundred five billion, one hundred one million, one hundred fifteen thousand, one hundred two".