343213221233221 has 4 divisors (see below), whose sum is σ = 345915687542272. Its totient is φ = 340510754924172.

The previous prime is 343213221233213. The next prime is 343213221233237. The reversal of 343213221233221 is 122332122312343.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 343213221233221 - 2³ = 343213221233213 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 (343213221233251) 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, 1351233154335 + ... + 1351233154588.

It is an arithmetic number, because the mean of its divisors is an integer number (86478921885568).

Almost surely, 2^{343213221233221} is an apocalyptic number.

It is an amenable number.

343213221233221 is a deficient number, since it is larger than the sum of its proper divisors (2702466309051).

343213221233221 is a wasteful number, since it uses less digits than its factorization.

343213221233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702466309050.

The product of its digits is 62208, while the sum is 34.

Adding to 343213221233221 its reverse (122332122312343), we get a palindrome (465545343545564).

The spelling of 343213221233221 in words is "three hundred forty-three trillion, two hundred thirteen billion, two hundred twenty-one million, two hundred thirty-three thousand, two hundred twenty-one".