345213353321 has 4 divisors (see below), whose sum is σ = 363382477200. Its totient is φ = 327044229444.

The previous prime is 345213353299. The next prime is 345213353333. The reversal of 345213353321 is 123353312543.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123353312543 = 9127 ⋅13515209.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345213353321 is a prime.

It is a super-2 number, since 2×345213353321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345213353021) 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, 9084561911 + ... + 9084561948.

It is an arithmetic number, because the mean of its divisors is an integer number (90845619300).

Almost surely, 2^345213353321 is an apocalyptic number.

It is an amenable number.

345213353321 is a deficient number, since it is larger than the sum of its proper divisors (18169123879).

345213353321 is a wasteful number, since it uses less digits than its factorization.

345213353321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18169123878.

The product of its digits is 97200, while the sum is 35.

Adding to 345213353321 its reverse (123353312543), we get a palindrome (468566665864).

The spelling of 345213353321 in words is "three hundred forty-five billion, two hundred thirteen million, three hundred fifty-three thousand, three hundred twenty-one".