321121241221345 has 8 divisors (see below), whose sum is σ = 387073496146176. Its totient is φ = 255744988523376.

The previous prime is 321121241221343. The next prime is 321121241221357. The reversal of 321121241221345 is 543122142121123.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 321121241221345 - 2¹ = 321121241221343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321121241221345.

It is not an unprimeable number, because it can be changed into a prime (321121241221343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144000555487 + ... + 144000557716.

It is an arithmetic number, because the mean of its divisors is an integer number (48384187018272).

Almost surely, 2^{321121241221345} is an apocalyptic number.

It is an amenable number.

321121241221345 is a deficient number, since it is larger than the sum of its proper divisors (65952254924831).

321121241221345 is a wasteful number, since it uses less digits than its factorization.

321121241221345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288001113431.

The product of its digits is 23040, while the sum is 34.

Adding to 321121241221345 its reverse (543122142121123), we get a palindrome (864243383342468).

The spelling of 321121241221345 in words is "three hundred twenty-one trillion, one hundred twenty-one billion, two hundred forty-one million, two hundred twenty-one thousand, three hundred forty-five".