352227221221 has 4 divisors (see below), whose sum is σ = 364372987500. Its totient is φ = 340081454944.

The previous prime is 352227221123. The next prime is 352227221233. The reversal of 352227221221 is 122122722253.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122122722253 = 7 ⋅17446103179.

It can be written as a sum of positive squares in 2 ways, for example, as 282274377025 + 69952844196 = 531295^2 + 264486^2 .

It is a cyclic number.

It is not a de Polignac number, because 352227221221 - 2¹³ = 352227213029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (352227221821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6072883096 + ... + 6072883153.

It is an arithmetic number, because the mean of its divisors is an integer number (91093246875).

Almost surely, 2^352227221221 is an apocalyptic number.

It is an amenable number.

352227221221 is a deficient number, since it is larger than the sum of its proper divisors (12145766279).

352227221221 is a wasteful number, since it uses less digits than its factorization.

352227221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12145766278.

The product of its digits is 13440, while the sum is 31.

Adding to 352227221221 its reverse (122122722253), we get a palindrome (474349943474).

The spelling of 352227221221 in words is "three hundred fifty-two billion, two hundred twenty-seven million, two hundred twenty-one thousand, two hundred twenty-one".