111211102122201 has 12 divisors (see below), whose sum is σ = 160888864336980. Its totient is φ = 74025070571520.

The previous prime is 111211102122163. The next prime is 111211102122221. The reversal of 111211102122201 is 102221201112111.

It is a happy number.

111211102122201 is a `hidden beast` number, since 1 + 1 + 121 + 110 + 212 + 220 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89580091784976 + 21631010337225 = 9464676^2 + 4650915^2 .

It is not a de Polignac number, because 111211102122201 - 2⁹ = 111211102121689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111211102122221) 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 11 ways as a sum of consecutive naturals, for example, 9638675296 + ... + 9638686833.

It is an arithmetic number, because the mean of its divisors is an integer number (13407405361415).

Almost surely, 2^{111211102122201} is an apocalyptic number.

It is an amenable number.

111211102122201 is a deficient number, since it is larger than the sum of its proper divisors (49677762214779).

111211102122201 is a wasteful number, since it uses less digits than its factorization.

111211102122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19277362776 (or 19277362773 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111211102122201 its reverse (102221201112111), we get a palindrome (213432303234312).

The spelling of 111211102122201 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred two million, one hundred twenty-two thousand, two hundred one".