321225244001 has 4 divisors (see below), whose sum is σ = 321226402500. Its totient is φ = 321224085504.

The previous prime is 321225243959. The next prime is 321225244007. The reversal of 321225244001 is 100442522123.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 100442522123 = 271 ⋅370636613.

It can be written as a sum of positive squares in 2 ways, for example, as 164167590976 + 157057653025 = 405176^2 + 396305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321225244001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321225244007) 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, 110225 + ... + 809073.

It is an arithmetic number, because the mean of its divisors is an integer number (80306600625).

Almost surely, 2^321225244001 is an apocalyptic number.

It is an amenable number.

321225244001 is a deficient number, since it is larger than the sum of its proper divisors (1158499).

321225244001 is an equidigital number, since it uses as much as digits as its factorization.

321225244001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158498.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 321225244001 its reverse (100442522123), we get a palindrome (421667766124).

The spelling of 321225244001 in words is "three hundred twenty-one billion, two hundred twenty-five million, two hundred forty-four thousand, one".