321243421145 has 8 divisors (see below), whose sum is σ = 385495345800. Its totient is φ = 256992576640.

The previous prime is 321243421133. The next prime is 321243421153. The reversal of 321243421145 is 541124342123.

It can be written as a sum of positive squares in 4 ways, for example, as 32817496336 + 288425924809 = 181156^2 + 537053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321243421145 - 2¹² = 321243417049 is a prime.

It is a super-2 number, since 2×321243421145² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703031 + ... + 1066179.

It is an arithmetic number, because the mean of its divisors is an integer number (48186918225).

Almost surely, 2^321243421145 is an apocalyptic number.

It is an amenable number.

321243421145 is a deficient number, since it is larger than the sum of its proper divisors (64251924655).

321243421145 is a wasteful number, since it uses less digits than its factorization.

321243421145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540075.

The product of its digits is 23040, while the sum is 32.

Adding to 321243421145 its reverse (541124342123), we get a palindrome (862367763268).

The spelling of 321243421145 in words is "three hundred twenty-one billion, two hundred forty-three million, four hundred twenty-one thousand, one hundred forty-five".