321321200201 has 4 divisors (see below), whose sum is σ = 321322612500. Its totient is φ = 321319787904.

The previous prime is 321321200153. The next prime is 321321200243. The reversal of 321321200201 is 102002123123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102002123123 = 919 ⋅110992517.

It can be written as a sum of positive squares in 2 ways, for example, as 311167614976 + 10153585225 = 557824^2 + 100765^2 .

It is a cyclic number.

It is not a de Polignac number, because 321321200201 - 2²⁶ = 321254091337 is a prime.

It is a super-2 number, since 2×321321200201² (a number of 24 digits) contains 22 as substring.

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 321321200201.

It is not an unprimeable number, because it can be changed into a prime (321321200801) 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, 278576 + ... + 848673.

It is an arithmetic number, because the mean of its divisors is an integer number (80330653125).

Almost surely, 2^321321200201 is an apocalyptic number.

It is an amenable number.

321321200201 is a deficient number, since it is larger than the sum of its proper divisors (1412299).

321321200201 is a wasteful number, since it uses less digits than its factorization.

321321200201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412298.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 321321200201 its reverse (102002123123), we get a palindrome (423323323324).

The spelling of 321321200201 in words is "three hundred twenty-one billion, three hundred twenty-one million, two hundred thousand, two hundred one".