111211201220201 has 4 divisors (see below), whose sum is σ = 111211542228612. Its totient is φ = 111210860211792.

The previous prime is 111211201220179. The next prime is 111211201220237. The reversal of 111211201220201 is 102022102112111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63557583234601 + 47653617985600 = 7972301^2 + 6903160^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211201220201 - 2¹⁰ = 111211201219177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111211201220201.

It is not an unprimeable number, because it can be changed into a prime (111211201220261) 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, 170014550 + ... + 170667423.

It is an arithmetic number, because the mean of its divisors is an integer number (27802885557153).

Almost surely, 2^{111211201220201} is an apocalyptic number.

It is an amenable number.

111211201220201 is a deficient number, since it is larger than the sum of its proper divisors (341008411).

111211201220201 is an equidigital number, since it uses as much as digits as its factorization.

111211201220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341008410.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111211201220201 its reverse (102022102112111), we get a palindrome (213233303332312).

The spelling of 111211201220201 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred one million, two hundred twenty thousand, two hundred one".