221201027 has 16 divisors (see below), whose sum is σ = 236974080. Its totient is φ = 206107200.

The previous prime is 221201017. The next prime is 221201033. The reversal of 221201027 is 720102122.

It is a cyclic number.

It is not a de Polignac number, because 221201027 - 2¹⁶ = 221135491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200996 and 221201014.

It is not an unprimeable number, because it can be changed into a prime (221201017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99308 + ... + 101510.

It is an arithmetic number, because the mean of its divisors is an integer number (14810880).

Almost surely, 2^221201027 is an apocalyptic number.

221201027 is a deficient number, since it is larger than the sum of its proper divisors (15773053).

221201027 is a wasteful number, since it uses less digits than its factorization.

221201027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 221201027 is about 14872.8284801513. The cubic root of 221201027 is about 604.7776219800. Note that the first 3 decimals are identical.

Adding to 221201027 its reverse (720102122), we get a palindrome (941303149).

The spelling of 221201027 in words is "two hundred twenty-one million, two hundred one thousand, twenty-seven".