200021120111 has 4 divisors (see below), whose sum is σ = 204276888672. Its totient is φ = 195765351552.

The previous prime is 200021120099. The next prime is 200021120183. The reversal of 200021120111 is 111021120002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200021120111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200021120092 and 200021120101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021120711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127884210 + ... + 2127884303.

It is an arithmetic number, because the mean of its divisors is an integer number (51069222168).

Almost surely, 2^200021120111 is an apocalyptic number.

200021120111 is a deficient number, since it is larger than the sum of its proper divisors (4255768561).

200021120111 is an equidigital number, since it uses as much as digits as its factorization.

200021120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255768560.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200021120111 its reverse (111021120002), we get a palindrome (311042240113).

The spelling of 200021120111 in words is "two hundred billion, twenty-one million, one hundred twenty thousand, one hundred eleven".