205021500112 has 40 divisors (see below), whose sum is σ = 466674818400. Its totient is φ = 86023006080.

The previous prime is 205021500067. The next prime is 205021500127. The reversal of 205021500112 is 211005120502.

It is a self number, because there is not a number n which added to its sum of digits gives 205021500112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44801362 + ... + 44805937.

It is an arithmetic number, because the mean of its divisors is an integer number (11666870460).

Almost surely, 2^205021500112 is an apocalyptic number.

205021500112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

205021500112 is an abundant number, since it is smaller than the sum of its proper divisors (261653318288).

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

205021500112 is a wasteful number, since it uses less digits than its factorization.

205021500112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89607331 (or 89607325 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 205021500112 its reverse (211005120502), we get a palindrome (416026620614).

The spelling of 205021500112 in words is "two hundred five billion, twenty-one million, five hundred thousand, one hundred twelve".