221022222221201 has 4 divisors (see below), whose sum is σ = 221131153826100. Its totient is φ = 220913290616304.

The previous prime is 221022222221159. The next prime is 221022222221233. The reversal of 221022222221201 is 102122222220122.

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 219189653553025 + 1832568668176 = 14805055^2 + 1353724^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022222221201 - 2³⁰ = 221021148479377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022252221201) 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, 54465799406 + ... + 54465803463.

It is an arithmetic number, because the mean of its divisors is an integer number (55282788456525).

Almost surely, 2^{221022222221201} is an apocalyptic number.

It is an amenable number.

221022222221201 is a deficient number, since it is larger than the sum of its proper divisors (108931604899).

221022222221201 is a wasteful number, since it uses less digits than its factorization.

221022222221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108931604898.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221022222221201 its reverse (102122222220122), we get a palindrome (323144444441323).

The spelling of 221022222221201 in words is "two hundred twenty-one trillion, twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred one".