205152017111 has 2 divisors, whose sum is σ = 205152017112. Its totient is φ = 205152017110.

The previous prime is 205152017047. The next prime is 205152017143. The reversal of 205152017111 is 111710251502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205152017111 - 2⁶ = 205152017047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205152217111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102576008555 + 102576008556.

It is an arithmetic number, because the mean of its divisors is an integer number (102576008556).

Almost surely, 2^205152017111 is an apocalyptic number.

205152017111 is a deficient number, since it is larger than the sum of its proper divisors (1).

205152017111 is an equidigital number, since it uses as much as digits as its factorization.

205152017111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 26.

Adding to 205152017111 its reverse (111710251502), we get a palindrome (316862268613).

The spelling of 205152017111 in words is "two hundred five billion, one hundred fifty-two million, seventeen thousand, one hundred eleven".