201220001220111 has 4 divisors (see below), whose sum is σ = 268293334960152. Its totient is φ = 134146667480072.

The previous prime is 201220001220047. The next prime is 201220001220157. The reversal of 201220001220111 is 111022100022102.

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 201220001220111 - 2⁶ = 201220001220047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220001220311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33536666870016 + ... + 33536666870021.

It is an arithmetic number, because the mean of its divisors is an integer number (67073333740038).

Almost surely, 2^{201220001220111} is an apocalyptic number.

201220001220111 is a deficient number, since it is larger than the sum of its proper divisors (67073333740041).

201220001220111 is an equidigital number, since it uses as much as digits as its factorization.

201220001220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67073333740040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201220001220111 its reverse (111022100022102), we get a palindrome (312242101242213).

The spelling of 201220001220111 in words is "two hundred one trillion, two hundred twenty billion, one million, two hundred twenty thousand, one hundred eleven".