321301226643161 has 4 divisors (see below), whose sum is σ = 323076371541924. Its totient is φ = 319526081744400.

The previous prime is 321301226643119. The next prime is 321301226643167. The reversal of 321301226643161 is 161346622103123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165862047017536 + 155439179625625 = 12878744^2 + 12467525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321301226643161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321301226643167) 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, 887572449110 + ... + 887572449471.

It is an arithmetic number, because the mean of its divisors is an integer number (80769092885481).

Almost surely, 2^{321301226643161} is an apocalyptic number.

It is an amenable number.

321301226643161 is a deficient number, since it is larger than the sum of its proper divisors (1775144898763).

321301226643161 is a wasteful number, since it uses less digits than its factorization.

321301226643161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775144898762.

The product of its (nonzero) digits is 186624, while the sum is 41.

Adding to 321301226643161 its reverse (161346622103123), we get a palindrome (482647848746284).

The spelling of 321301226643161 in words is "three hundred twenty-one trillion, three hundred one billion, two hundred twenty-six million, six hundred forty-three thousand, one hundred sixty-one".