200121202111985 has 16 divisors (see below), whose sum is σ = 299402110173312. Its totient is φ = 124750879238400.

The previous prime is 200121202111979. The next prime is 200121202111993. The reversal of 200121202111985 is 589111202121002.

200121202111985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 200121202111985 - 2¹⁸ = 200121201849841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259897664696 + ... + 259897665465.

It is an arithmetic number, because the mean of its divisors is an integer number (18712631885832).

Almost surely, 2^{200121202111985} is an apocalyptic number.

It is an amenable number.

200121202111985 is a deficient number, since it is larger than the sum of its proper divisors (99280908061327).

200121202111985 is a wasteful number, since it uses less digits than its factorization.

200121202111985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519795330184.

The product of its (nonzero) digits is 5760, while the sum is 35.

Adding to 200121202111985 its reverse (589111202121002), we get a palindrome (789232404232987).

The spelling of 200121202111985 in words is "two hundred trillion, one hundred twenty-one billion, two hundred two million, one hundred eleven thousand, nine hundred eighty-five".