221221030332201 has 16 divisors (see below), whose sum is σ = 300251733165120. Its totient is φ = 144842844726720.

The previous prime is 221221030332157. The next prime is 221221030332257. The reversal of 221221030332201 is 102233030122122.

It is not a de Polignac number, because 221221030332201 - 2³¹ = 221218882848553 is a prime.

It is a super-2 number, since 2×221221030332201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221221030332271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917070670 + ... + 917311863.

It is an arithmetic number, because the mean of its divisors is an integer number (18765733322820).

Almost surely, 2^{221221030332201} is an apocalyptic number.

It is an amenable number.

221221030332201 is a deficient number, since it is larger than the sum of its proper divisors (79030702832919).

221221030332201 is a wasteful number, since it uses less digits than its factorization.

221221030332201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834383256.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 221221030332201 its reverse (102233030122122), we get a palindrome (323454060454323).

The spelling of 221221030332201 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, thirty million, three hundred thirty-two thousand, two hundred one".