111221200221201 has 24 divisors (see below), whose sum is σ = 183605341742784. Its totient is φ = 63554247891360.

The previous prime is 111221200221167. The next prime is 111221200221221. The reversal of 111221200221201 is 102122002122111.

111221200221201 is a `hidden beast` number, since 1 + 1 + 1 + 221 + 20 + 0 + 221 + 201 = 666.

It is not a de Polignac number, because 111221200221201 - 2⁶ = 111221200221137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111221200221221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4449486 + ... + 15564071.

It is an arithmetic number, because the mean of its divisors is an integer number (7650222572616).

Almost surely, 2^{111221200221201} is an apocalyptic number.

It is an amenable number.

111221200221201 is a deficient number, since it is larger than the sum of its proper divisors (72384141521583).

111221200221201 is a wasteful number, since it uses less digits than its factorization.

111221200221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101781 (or 20101778 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111221200221201 its reverse (102122002122111), we get a palindrome (213343202343312).

The spelling of 111221200221201 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred million, two hundred twenty-one thousand, two hundred one".