343203420221321 has 16 divisors (see below), whose sum is σ = 376432638424128. Its totient is φ = 310316796753600.

The previous prime is 343203420221317. The next prime is 343203420221357. The reversal of 343203420221321 is 123122024302343.

It is a cyclic number.

It is not a de Polignac number, because 343203420221321 - 2² = 343203420221317 is a prime.

It is a super-2 number, since 2×343203420221321² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (343203420221621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109542950 + ... + 112632431.

It is an arithmetic number, because the mean of its divisors is an integer number (23527039901508).

Almost surely, 2^{343203420221321} is an apocalyptic number.

It is an amenable number.

343203420221321 is a deficient number, since it is larger than the sum of its proper divisors (33229218202807).

343203420221321 is a wasteful number, since it uses less digits than its factorization.

343203420221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222176152.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 343203420221321 its reverse (123122024302343), we get a palindrome (466325444523664).

The spelling of 343203420221321 in words is "three hundred forty-three trillion, two hundred three billion, four hundred twenty million, two hundred twenty-one thousand, three hundred twenty-one".