343442332021221 has 6 divisors (see below), whose sum is σ = 496083368475110. Its totient is φ = 228961554680808.

The previous prime is 343442332021219. The next prime is 343442332021337. The reversal of 343442332021221 is 122120233244343.

343442332021221 is a `hidden beast` number, since 3 + 4 + 3 + 4 + 423 + 3 + 2 + 0 + 2 + 1 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 339207437232225 + 4234894788996 = 18417585^2 + 2057886^2 .

It is not a de Polignac number, because 343442332021221 - 2¹ = 343442332021219 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 (343442332021721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19080129556726 + ... + 19080129556743.

Almost surely, 2^{343442332021221} is an apocalyptic number.

It is an amenable number.

343442332021221 is a deficient number, since it is larger than the sum of its proper divisors (152641036453889).

343442332021221 is a wasteful number, since it uses less digits than its factorization.

343442332021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38160259113475 (or 38160259113472 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 343442332021221 its reverse (122120233244343), we get a palindrome (465562565265564).

The spelling of 343442332021221 in words is "three hundred forty-three trillion, four hundred forty-two billion, three hundred thirty-two million, twenty-one thousand, two hundred twenty-one".