200120122211985 has 24 divisors (see below), whose sum is σ = 346894609971624. Its totient is φ = 106724660624640.

The previous prime is 200120122211953. The next prime is 200120122212037. The reversal of 200120122211985 is 589112221021002.

200120122211985 is a `hidden beast` number, since 200 + 120 + 122 + 21 + 198 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7828540990209 + 192291581221776 = 2797953^2 + 13866924^2 .

It is not a de Polignac number, because 200120122211985 - 2⁵ = 200120122211953 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 125683852 + ... + 127266141.

It is an arithmetic number, because the mean of its divisors is an integer number (14453942082151).

Almost surely, 2^{200120122211985} is an apocalyptic number.

It is an amenable number.

200120122211985 is a deficient number, since it is larger than the sum of its proper divisors (146774487759639).

200120122211985 is a wasteful number, since it uses less digits than its factorization.

200120122211985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252967585 (or 252967582 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

Adding to 200120122211985 its reverse (589112221021002), we get a palindrome (789232343232987).

The spelling of 200120122211985 in words is "two hundred trillion, one hundred twenty billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred eighty-five".