201020200120111 has 4 divisors (see below), whose sum is σ = 201024407459800. Its totient is φ = 201015992780424.

The previous prime is 201020200120073. The next prime is 201020200120139. The reversal of 201020200120111 is 111021002020102.

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-201020200120111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201020200120091 and 201020200120100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020200126111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2103598176 + ... + 2103693733.

It is an arithmetic number, because the mean of its divisors is an integer number (50256101864950).

Almost surely, 2^{201020200120111} is an apocalyptic number.

201020200120111 is a deficient number, since it is larger than the sum of its proper divisors (4207339689).

201020200120111 is an equidigital number, since it uses as much as digits as its factorization.

201020200120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207339688.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201020200120111 its reverse (111021002020102), we get a palindrome (312041202140213).

The spelling of 201020200120111 in words is "two hundred one trillion, twenty billion, two hundred million, one hundred twenty thousand, one hundred eleven".