321440101 has 4 divisors (see below), whose sum is σ = 321508492. Its totient is φ = 321371712.

The previous prime is 321440099. The next prime is 321440107. The reversal of 321440101 is 101044123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101044123 = 523 ⋅193201.

It can be written as a sum of positive squares in 2 ways, for example, as 297528001 + 23912100 = 17249^2 + 4890^2 .

It is a cyclic number.

It is not a de Polignac number, because 321440101 - 2¹ = 321440099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321440107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26580 + ... + 36733.

It is an arithmetic number, because the mean of its divisors is an integer number (80377123).

Almost surely, 2^321440101 is an apocalyptic number.

It is an amenable number.

321440101 is a deficient number, since it is larger than the sum of its proper divisors (68391).

321440101 is an equidigital number, since it uses as much as digits as its factorization.

321440101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68390.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 321440101 is about 17928.7506815171. The cubic root of 321440101 is about 685.0149008427.

Adding to 321440101 its reverse (101044123), we get a palindrome (422484224).

The spelling of 321440101 in words is "three hundred twenty-one million, four hundred forty thousand, one hundred one".