200120111 has 4 divisors (see below), whose sum is σ = 200256000. Its totient is φ = 199984224.

The previous prime is 200120069. The next prime is 200120131. The reversal of 200120111 is 111021002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111021002 = 2 ⋅55510501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200120111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65711 + ... + 68688.

It is an arithmetic number, because the mean of its divisors is an integer number (50064000).

Almost surely, 2^200120111 is an apocalyptic number.

200120111 is a deficient number, since it is larger than the sum of its proper divisors (135889).

200120111 is a wasteful number, since it uses less digits than its factorization.

200120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135888.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 200120111 is about 14146.3815514781. The cubic root of 200120111 is about 584.9205931131.

Adding to 200120111 its reverse (111021002), we get a palindrome (311141113).

The spelling of 200120111 in words is "two hundred million, one hundred twenty thousand, one hundred eleven".