321401253601 has 4 divisors (see below), whose sum is σ = 321407600832. Its totient is φ = 321394906372.

The previous prime is 321401253577. The next prime is 321401253611. The reversal of 321401253601 is 106352104123.

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: 106352104123 = 7211 ⋅14748593.

It is a cyclic number.

It is not a de Polignac number, because 321401253601 - 2¹¹ = 321401251553 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 321401253601.

It is not an unprimeable number, because it can be changed into a prime (321401253611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3097045 + ... + 3199138.

It is an arithmetic number, because the mean of its divisors is an integer number (80351900208).

Almost surely, 2^321401253601 is an apocalyptic number.

It is an amenable number.

321401253601 is a deficient number, since it is larger than the sum of its proper divisors (6347231).

321401253601 is an equidigital number, since it uses as much as digits as its factorization.

321401253601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6347230.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 321401253601 its reverse (106352104123), we get a palindrome (427753357724).

The spelling of 321401253601 in words is "three hundred twenty-one billion, four hundred one million, two hundred fifty-three thousand, six hundred one".