205102414111 has 4 divisors (see below), whose sum is σ = 234402758992. Its totient is φ = 175802069232.

The previous prime is 205102414063. The next prime is 205102414177. The reversal of 205102414111 is 111414201502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205102414111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205102444111) 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, 14650172430 + ... + 14650172443.

It is an arithmetic number, because the mean of its divisors is an integer number (58600689748).

Almost surely, 2^205102414111 is an apocalyptic number.

205102414111 is a deficient number, since it is larger than the sum of its proper divisors (29300344881).

205102414111 is an equidigital number, since it uses as much as digits as its factorization.

205102414111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29300344880.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 205102414111 its reverse (111414201502), we get a palindrome (316516615613).

The spelling of 205102414111 in words is "two hundred five billion, one hundred two million, four hundred fourteen thousand, one hundred eleven".