205512330120102 has 80 divisors (see below), whose sum is σ = 480733380056160. Its totient is φ = 65496789122688.

The previous prime is 205512330120077. The next prime is 205512330120121. The reversal of 205512330120102 is 201021033215502.

205512330120102 is a `hidden beast` number, since 2 + 0 + 5 + 512 + 3 + 30 + 12 + 0 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3700023 + ... + 20608610.

It is an arithmetic number, because the mean of its divisors is an integer number (6009167250702).

Almost surely, 2^{205512330120102} is an apocalyptic number.

205512330120102 is an abundant number, since it is smaller than the sum of its proper divisors (275221049936058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205512330120102 is a wasteful number, since it uses less digits than its factorization.

205512330120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24310939 (or 24310930 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 205512330120102 its reverse (201021033215502), we get a palindrome (406533363335604).

The spelling of 205512330120102 in words is "two hundred five trillion, five hundred twelve billion, three hundred thirty million, one hundred twenty thousand, one hundred two".