201220201111 has 4 divisors (see below), whose sum is σ = 203294636272. Its totient is φ = 199145765952.

The previous prime is 201220201109. The next prime is 201220201121. The reversal of 201220201111 is 111102022102.

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

It is a cyclic number.

It is not a de Polignac number, because 201220201111 - 2¹ = 201220201109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220201091 and 201220201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220201121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1037217435 + ... + 1037217628.

It is an arithmetic number, because the mean of its divisors is an integer number (50823659068).

Almost surely, 2^201220201111 is an apocalyptic number.

201220201111 is a deficient number, since it is larger than the sum of its proper divisors (2074435161).

201220201111 is an equidigital number, since it uses as much as digits as its factorization.

201220201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074435160.

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

Adding to 201220201111 its reverse (111102022102), we get a palindrome (312322223213).

The spelling of 201220201111 in words is "two hundred one billion, two hundred twenty million, two hundred one thousand, one hundred eleven".