343340140421321 has 4 divisors (see below), whose sum is σ = 363536619269652. Its totient is φ = 323143661572992.

The previous prime is 343340140421263. The next prime is 343340140421351. The reversal of 343340140421321 is 123124041043343.

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 146508752646400 + 196831387774921 = 12104080^2 + 14029661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343340140421321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343340140421351) 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, 10098239424140 + ... + 10098239424173.

It is an arithmetic number, because the mean of its divisors is an integer number (90884154817413).

Almost surely, 2^{343340140421321} is an apocalyptic number.

It is an amenable number.

343340140421321 is a deficient number, since it is larger than the sum of its proper divisors (20196478848331).

343340140421321 is a wasteful number, since it uses less digits than its factorization.

343340140421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20196478848330.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 343340140421321 its reverse (123124041043343), we get a palindrome (466464181464664).

The spelling of 343340140421321 in words is "three hundred forty-three trillion, three hundred forty billion, one hundred forty million, four hundred twenty-one thousand, three hundred twenty-one".